[Github] Make bazel workflow run all tests (llvm#167576)

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

@@ -33,7 +33,11 @@ jobs:
   
   bazel-build:
     name: "Bazel Build/Test"
-    runs-on: llvm-premerge-linux-runners
+    # Only run on US Central workers so we only have to keep one cache warm as
+    # the cache buckets are per cluster.
+    runs-on:
+      group: llvm-premerge-cluster-us-central
+      labels: llvm-premerge-linux-runners
     if: github.repository == 'llvm/llvm-project'
     steps:
       - name: Fetch LLVM sources
@@ -44,7 +48,7 @@ jobs:
       - name: Setup System Dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y libmpfr-dev libpfm4-dev
+          sudo apt-get install -y libmpfr-dev libpfm4-dev m4 libedit-dev
           sudo curl -L https://github.com/bazelbuild/bazelisk/releases/download/v1.27.0/bazelisk-amd64.deb > /tmp/bazelisk.deb
           sudo apt-get install -y /tmp/bazelisk.deb
           rm /tmp/bazelisk.deb
@@ -54,4 +58,4 @@ 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//... //...