scripts: Generate CI kernel matrices

Keep exact kernel versions only in ABT_KERNELS. Resolve the bounded GitHub
regression and RPM subsets from stable selectors, and reject missing or
ambiguous matches.

.github/kernel-matrix.conf

@@ -0,0 +1,68 @@
+# Kernel selectors for the GitHub Actions regression subset. Upstream kernels
+# are selected by major.minor. Distribution kernels are selected by
+# distribution and release; add major.minor only when that pair is ambiguous.
+GITHUB_REGRESSION_KERNEL_SELECTORS="\
+7.2 \
+7.1 \
+7.0 \
+6.19 \
+6.18 \
+6.17 \
+6.16 \
+6.15 \
+6.14 \
+6.13 \
+6.12 \
+6.11 \
+6.10 \
+6.9 \
+6.8 \
+6.7 \
+6.6 \
+6.1 \
+5.15 \
+5.10 \
+5.4 \
+4.19 \
+4.14 \
+4.9 \
+3.18 \
+3.10 \
+Rocky^10.2 \
+Rocky^10.1 \
+Rocky^9.8 \
+Rocky^9.7 \
+Rocky^8.10 \
+AlmaLinux^10.0 \
+AlmaLinux^9.6 \
+AlmaLinux^9.5 \
+AlmaLinux^9.4 \
+AlmaLinux^9.3 \
+AlmaLinux^9.2 \
+AlmaLinux^9.1 \
+AlmaLinux^9.0 \
+AlmaLinux^8.9 \
+AlmaLinux^8.8 \
+AlmaLinux^8.7 \
+AlmaLinux^8.6 \
+AlmaLinux^8.5 \
+AlmaLinux^8.4 \
+AlmaLinux^8.3 \
+CentOS^7.9.2009 \
+CentOS^7.5.1804 \
+UEK^10 \
+UEK^9 \
+UEK^8 \
+UEK^7^4.14 \
+UEK^7^4.1 \
+"
+
+# target|selector|display name|base image|kernel package|kernel repository
+GITHUB_RPM_TARGETS="
+rocky-10.2|Rocky^10.2|Rocky Linux 10.2|rockylinux/rockylinux:10.2|kernel|
+rocky-9.8|Rocky^9.8|Rocky Linux 9.8|rockylinux/rockylinux:9.8|kernel|
+rocky-8.10|Rocky^8.10|Rocky Linux 8.10|rockylinux/rockylinux:8.10|kernel|
+uek-10|UEK^10|Oracle Linux 10 UEK|oraclelinux:10|kernel-uek|ol10_UEKR8
+uek-9|UEK^9|Oracle Linux 9 UEK|oraclelinux:9|kernel-uek|ol9_UEKR7
+uek-8|UEK^8|Oracle Linux 8 UEK|oraclelinux:8|kernel-uek|ol8_UEKR6
+"