Separate clang-tidy into its own CI task (#2567)

clang-tidy takes 4 minutes on my laptop compared to ALL_TESTS=1 which
takes 8 minutes.  Using a separate tasks avoids duplicating clang-tidy
and unnecessarily slowing CI run-time.

.github/workflows/ci.yml

@@ -35,7 +35,6 @@ on:
 jobs:
   Linux:
     runs-on: ubuntu-latest
-
     #
     # build matrix for containers
     #
@@ -114,14 +113,6 @@ jobs:
           /bin/sh -c "./configure ${CONFIGURE_OPTIONS}"
           make --jobs=$(nproc)
 
-      - name: clang-tidy
-        run: |
-          # skip if clang-tidy does not exist, e.g., CentOS 7
-          if command -v clang-tidy; then
-            make -C src/ clang-tidy
-            make -C test/ clang-tidy
-          fi
-
       - name: Cppcheck
         run: |
           # specify the version range to run cppcheck (cppcheck version number is x.y or x.y.z)
@@ -300,6 +291,31 @@ jobs:
         run: |
           /bin/sh -c "ALL_TESTS=1 ASAN_OPTIONS=${ASAN_OPTIONS} TSAN_OPTIONS=${TSAN_OPTIONS} VALGRIND=${VALGRIND} RETRIES=${RETRIES} make check -C test || (test/filter-suite-log.sh test/test-suite.log; exit 1)"
 
+  clang-tidy:
+    runs-on: ubuntu-latest
+    container:
+      image: fedora:40
+
+    steps:
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Install packages
+        run: |
+          .github/workflows/linux-ci-helper.sh fedora:40
+
+      - name: Build
+        run: |
+          ./autogen.sh
+          /bin/sh -c "./configure ${CONFIGURE_OPTIONS}"
+          make --jobs=$(nproc)
+
+      - name: clang-tidy
+        run: |
+          make -C src/ clang-tidy
+          make -C test/ clang-tidy
+
+
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