Update Netty and OkHttp dependencies and resolve test failures (#3066)

This commit updates several dependencies in dependencies.gradle and resolves the resulting test failures:
- Netty: Updated strict upper bound from <4.2.0 to <5.0.0 (resolved to 4.2.14.Final).
- OkHttp: Removed strict upper bound of <5.0.0 and moved to dynamic versions section (resolved to 5.3.2).
- Cleaned up dependencies.gradle by moving strict dependencies (secretmanager, common-protos, gax) out of the dynamic versions section.
- Updated all gradle.lockfile files.

Resulting test fixes:
- Netty: Replaced NioEventLoopGroup with DefaultEventLoopGroup in NettyExtension and ProbingStepTest. In Netty 4.2+, LocalServerChannel no longer supports registration with NIO-backed event loops, throwing an IllegalArgumentException.
- OkHttp: Refactored ServiceMonitoringClient to safely handle empty responses using Optional.orElse(). In OkHttp 5.x, a 204 No Content response returns a non-null ResponseBody with an empty string, causing an assertion failure where MosApiException was incorrectly bypassed.

db/gradle.lockfile

@@ -20,19 +20,19 @@ com.github.jnr:jnr-unixsocket:0.38.25=deploy_jar,runtimeClasspath,testRuntimeCla
 com.github.jnr:jnr-x86asm:1.0.2=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.github.kevinstern:software-and-algorithms:1.0=annotationProcessor,testAnnotationProcessor
 com.google.api-client:google-api-client:2.9.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
-com.google.api:api-common:2.53.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
-com.google.api:gax:2.79.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
-com.google.apis:google-api-services-sqladmin:v1beta4-rev20260317-2.0.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
-com.google.auth:google-auth-library-credentials:1.46.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
-com.google.auth:google-auth-library-oauth2-http:1.46.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.api:api-common:2.63.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.api:gax:2.80.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.apis:google-api-services-sqladmin:v1beta4-rev20260510-2.0.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.auth:google-auth-library-credentials:1.47.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.auth:google-auth-library-oauth2-http:1.47.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.google.auto.service:auto-service-annotations:1.0.1=annotationProcessor,testAnnotationProcessor
 com.google.auto.value:auto-value-annotations:1.11.0=deploy_jar,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 com.google.auto.value:auto-value-annotations:1.9=annotationProcessor,testAnnotationProcessor
 com.google.auto:auto-common:1.2.2=annotationProcessor,testAnnotationProcessor
-com.google.cloud.sql:jdbc-socket-factory-core:1.28.3=deploy_jar,runtimeClasspath,testRuntimeClasspath
-com.google.cloud.sql:postgres-socket-factory:1.28.3=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.cloud.sql:jdbc-socket-factory-core:1.28.4=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.cloud.sql:postgres-socket-factory:1.28.4=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.google.code.findbugs:jsr305:3.0.2=checkstyle,deploy_jar,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
-com.google.code.gson:gson:2.12.1=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.code.gson:gson:2.13.2=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.google.errorprone:error_prone_annotation:2.48.0=annotationProcessor,testAnnotationProcessor
 com.google.errorprone:error_prone_annotations:2.36.0=checkstyle
 com.google.errorprone:error_prone_annotations:2.48.0=annotationProcessor,testAnnotationProcessor
@@ -57,7 +57,7 @@ com.google.j2objc:j2objc-annotations:3.1=annotationProcessor,deploy_jar,runtimeC
 com.google.oauth-client:google-oauth-client:1.39.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.google.protobuf:protobuf-java-util:4.33.2=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.google.protobuf:protobuf-java:4.33.2=annotationProcessor,testAnnotationProcessor
-com.google.protobuf:protobuf-java:4.34.1=deploy_jar,runtimeClasspath,testRuntimeClasspath
+com.google.protobuf:protobuf-java:4.35.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
 com.google.truth:truth:1.4.5=testCompileClasspath,testRuntimeClasspath
 com.puppycrawl.tools:checkstyle:10.24.0=checkstyle
 commons-beanutils:commons-beanutils:1.10.1=checkstyle
@@ -67,12 +67,12 @@ commons-codec:commons-codec:1.19.0=compileClasspath,deploy_jar,runtimeClasspath
 commons-collections:commons-collections:3.2.2=checkstyle
 commons-io:commons-io:2.20.0=compileClasspath,deploy_jar,runtimeClasspath
 commons-logging:commons-logging:1.2=deploy_jar,runtimeClasspath,testRuntimeClasspath
-dnsjava:dnsjava:3.6.4=deploy_jar,runtimeClasspath,testRuntimeClasspath
+dnsjava:dnsjava:3.6.5=deploy_jar,runtimeClasspath,testRuntimeClasspath
 info.picocli:picocli:4.7.7=checkstyle
 io.github.eisop:dataflow-errorprone:3.41.0-eisop1=annotationProcessor,testAnnotationProcessor
 io.github.java-diff-utils:java-diff-utils:4.12=annotationProcessor,testAnnotationProcessor
 io.github.java-diff-utils:java-diff-utils:4.17=testCompileClasspath,testRuntimeClasspath
-io.grpc:grpc-api:1.70.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
+io.grpc:grpc-api:1.81.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
 io.grpc:grpc-context:1.70.0=deploy_jar,runtimeClasspath,testRuntimeClasspath
 io.opencensus:opencensus-api:0.31.1=deploy_jar,runtimeClasspath,testRuntimeClasspath
 io.opencensus:opencensus-contrib-http-util:0.31.1=deploy_jar,runtimeClasspath,testRuntimeClasspath
@@ -141,7 +141,7 @@ org.postgresql:postgresql:42.7.11=deploy_jar,runtimeClasspath,testRuntimeClasspa
 org.reflections:reflections:0.10.2=checkstyle
 org.rnorth.duct-tape:duct-tape:1.0.8=compileClasspath,deploy_jar,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.slf4j:slf4j-api:1.7.36=compileClasspath,testCompileClasspath
-org.slf4j:slf4j-api:2.0.17=deploy_jar,runtimeClasspath,testRuntimeClasspath
+org.slf4j:slf4j-api:2.0.18=deploy_jar,runtimeClasspath,testRuntimeClasspath
 org.testcontainers:database-commons:1.21.4=testCompileClasspath,testRuntimeClasspath
 org.testcontainers:jdbc:1.21.4=testCompileClasspath,testRuntimeClasspath
 org.testcontainers:junit-jupiter:1.21.4=testCompileClasspath,testRuntimeClasspath