[Github] Make bazel workflow run all tests

Now that the caching seems to be working reasonably well, enable
building and testing the entirety of the project to actually catch most
of the build configuration issues that this workflow is intended to
catch.

Author: boomanaiden154

.github/workflows/bazel-checks.yml

@@ -54,4 +54,4 @@ jobs:
           bazelisk test --config=ci --sandbox_base="" \
             --remote_cache=https://storage.googleapis.com/$CACHE_GCS_BUCKET-bazel \
             --google_default_credentials \
-            @llvm-project//llvm/unittests:adt_tests
+            @llvm-project//...