Refactor CI to run GraalVM native build in separate job

[vorburger]

As proposed here by @cushon

[cushon]

experimental isn't part of the matrix for this job, I think it needs to be added, or else this could just hard-code continue-on-error: true for now if we want it to be true for both jobs

We should probably also remove continue-on-error: true once we start doing releases that depend on this, but I think it's OK to leave in for now while the graal stuff is being iterated on

[cushon]

Thanks! This looks about like what I expected, but I don't see see any CI runs for this PR? https://github.com/google/google-java-format/actions/workflows/ci.yml

I'm not sure why it hasn't run, any ideas? I wonder if there's an error here preventing it from running that's not being reported.

[cushon]

Ah, neat, the built-in GitHub editor shows errors for the config file. I pushed a commit that I think fixes it.

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0c8cc2b5..322f914e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -81,14 +81,14 @@ jobs:
         shell: bash
         run: mvn test -B
 
-  test-OpenJDK:
+  test-GraalVM:
     name: "GraalVM on ${{ matrix.os }}"
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
-    continue-on-error: ${{ matrix.experimental }}
+    continue-on-error: true
     steps:
       - name: Cancel previous
         uses: styfle/[email protected]
@@ -111,7 +111,7 @@ jobs:
 
   publish_snapshot:
     name: "Publish snapshot"
-    needs: test
+    needs: test-OpenJDK
     if: github.event_name == 'push' && github.repository == 'google/google-java-format' && github.ref == 'refs/heads/master'
     runs-on: ubuntu-latest
     steps:

[cushon]

CI looks better now, I'll go ahead and merge but we can keep iterating if you disagree with any of the edits