Do not build linux-tests for fake platform with clang. Disable such t…

…ests in general in cloudbuild. (project-chip#20373) (project-chip#20424)

* Do not build fake-tests-clang

The compiler platform for fake-tests is //build/toolchain/fake:fake_x64_gcc
which is NOT a clang toolchain.

* Add a comment about why the board check is done

* Fix unit tests

* Do not build tests (not even the clang version) for all build in cloudbuild

* Do not build tests (not even the clang version) for all build in cloudbuild

* Restyle

* Revert "Restyle"

This reverts commit 8bd2f67.

integrations/cloudbuild/build-all.yaml

@@ -19,7 +19,7 @@ steps:
           - >-
               ./scripts/build/build_examples.py --enable-flashbundle
               --target-glob '*' --skip-target-glob
-              '{mbed-*,tizen-*,*-tests*,*-chip-test}' build --create-archives
+              '{tizen-*,*-tests*,*-chip-test}' build --create-archives
               /workspace/artifacts/
       id: CompileAll
       waitFor:

scripts/build/build/targets.py

@@ -314,6 +314,8 @@ def HostTargets():
     yield target_native.Extend('all-clusters-app-nodeps', app=HostApp.ALL_CLUSTERS, **nodeps_args)
 
     test_target = Target(HostBoard.NATIVE.PlatformName(), HostBuilder)
+    yield test_target.Extend(HostBoard.NATIVE.BoardName() + '-tests', board=HostBoard.NATIVE, app=HostApp.TESTS)
+    yield test_target.Extend(HostBoard.NATIVE.BoardName() + '-tests-clang', board=HostBoard.NATIVE, app=HostApp.TESTS, use_clang=True)
     yield test_target.Extend(HostBoard.FAKE.BoardName() + '-tests', board=HostBoard.FAKE, app=HostApp.TESTS)