ci: Add release build for gcc/x86_64

Now that we are running on Ubuntu 24.04, the gcc version is enough up-to-date
to be able to build in release mode.

Signed-off-by: Manu Bretelle <[email protected]>

Author: chantra

.github/scripts/matrix.py

@@ -159,6 +159,7 @@ def generate_test_config(test: str) -> Dict[str, Union[str, int]]:
             toolchain=Toolchain(compiler=Compiler.GCC, version=DEFAULT_LLVM_VERSION),
             run_veristat=True,
             parallel_tests=True,
+            build_release=True,
         ),
         BuildConfig(
             arch=Arch.X86_64,