Fix pkgs-with-tests-named.sh matching tests from subdirectories (#119501)

* Fix pkgs-with-tests-named.sh matching tests from subdirectories

The find command was recursive by default, causing packages to be
included in the results based on test functions in subdirectory packages.
Adding -maxdepth 1 matches Go's package semantics where only files in
the same directory belong to a package.

* ci: trigger integration tests for backend test script changes

.github/actions/change-detection/action.yml

@@ -78,6 +78,7 @@ runs:
             - '.github/actions/change-detection/**'
             - '**.cue'
             - 'devenv/docker/blocks/*_tests/**'
+            - 'scripts/ci/backend-tests/**'
             - 'kindsv2/**'
             - '${{ inputs.self }}'
           frontend:

scripts/ci/backend-tests/pkgs-with-tests-named.sh

@@ -60,7 +60,7 @@ fi
 readarray -t PACKAGES <<< "$(go list -f '{{.Dir}}' -e "${dirs[@]}")"
 
 for i in "${!PACKAGES[@]}"; do
-    readarray -t PKG_FILES <<< "$(find "${PACKAGES[$i]}" -type f -name '*_test.go')"
+    readarray -t PKG_FILES <<< "$(find "${PACKAGES[$i]}" -maxdepth 1 -type f -name '*_test.go')"
     if [ ${#PKG_FILES[@]} -eq 0 ] || [ ${#PKG_FILES[@]} -eq 1 ] && [ -z "${PKG_FILES[0]}" ]; then
         unset "PACKAGES[$i]"
         continue