Bump Velero dependencies to latest version.

* Fix UT failures caused by client-go version bump.
* Some modifications to enhance the UT stability.
* Fix UT errors: non-constant format string in call to ...
* Fix linter issues.

Signed-off-by: Xun Jiang <xun.jiang@broadcom.com>

.github/workflows/get-go-version.yaml

@@ -25,7 +25,7 @@ jobs:
               version=$(grep '^go ' go.mod | awk '{print $2}' | cut -d. -f1-2)
             else
               goDirectiveVersion=$(grep '^go ' go.mod | awk '{print $2}')
-              toolChainVersion=$(grep '^toolchain ' go.mod | awk '{print $2}')
+              toolChainVersion=$(grep '^toolchain ' go.mod | awk '{print $2}' | sed 's/^go//')
               version=$(printf "%s\n%s\n" "$goDirectiveVersion" "$toolChainVersion" | sort -V | tail -n1)
             fi
 

.github/workflows/pr-linter-check.yml

@@ -28,5 +28,5 @@ jobs:
       - name: Linter check
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.5.0
+          version: v2.12.0
           args: --verbose