tools: add sccache to test-internet workflow

PR-URL: #59720
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>
Reviewed-By: Moshe Atlow <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: aduh95

.github/workflows/test-internet.yml

@@ -34,8 +34,9 @@ env:
   PYTHON_VERSION: '3.12'
   FLAKY_TESTS: keep_retrying
   CLANG_VERSION: '19'
-  CC: clang-19
-  CXX: clang++-19
+  CC: sccache clang-19
+  CXX: sccache clang++-19
+  SCCACHE_GHA_ENABLED: 'true'
 
 permissions:
   contents: read
@@ -56,6 +57,10 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+      - name: Set up sccache
+        uses: Mozilla-Actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # v0.0.9
+        with:
+          version: v0.10.0
       - name: Environment Information
         run: npx envinfo
       - name: Build