ci: Add job for Debian 10 legacy packages

Test Python 2 packages in Debian 10.  They are not available in Debian 12.

.gitlab-ci.yml

@@ -344,6 +344,17 @@ t:linux-gcc-cxx-modules-ninja-multi:
     variables:
         CMAKE_CI_JOB_NIGHTLY: "true"
 
+t:debian10-legacy:
+    extends:
+        - .debian10_legacy
+        - .cmake_test_linux_release
+        - .linux_x86_64_tags
+        - .cmake_junit_artifacts
+        - .run_dependent
+        - .needs_centos6_x86_64
+    variables:
+        CMAKE_CI_JOB_NIGHTLY: "true"
+
 b:fedora38-ninja:
     extends:
         - .fedora38_ninja

.gitlab/ci/configure_debian10_legacy.cmake

@@ -0,0 +1,6 @@
+set(CMake_TEST_FindPython2 "ON" CACHE BOOL "")
+set(CMake_TEST_FindPython2_IronPython "ON" CACHE BOOL "")
+set(CMake_TEST_FindPython2_NumPy "ON" CACHE BOOL "")
+set(CMake_TEST_FindPython2_PyPy "ON" CACHE BOOL "")
+
+include("${CMAKE_CURRENT_LIST_DIR}/configure_external_test.cmake")

.gitlab/os-linux.yml

@@ -383,6 +383,22 @@
         CMAKE_CONFIGURATION: linux_gcc_cxx_modules_ninja_multi
         CMAKE_GENERATOR: "Ninja Multi-Config"
 
+### Debian 10 legacy packages
+
+.debian10:
+    image: "kitware/cmake:ci-debian10-x86_64-2023-07-31"
+
+    variables:
+        GIT_CLONE_PATH: "$CI_BUILDS_DIR/cmake ci"
+        CMAKE_ARCH: x86_64
+
+.debian10_legacy:
+    extends: .debian10
+
+    variables:
+        CMAKE_CONFIGURATION: debian10_legacy
+        CTEST_LABELS: "Python2"
+
 ## Tags
 
 .linux_x86_64_tags: