ci: Skip optional E2E tests on release branches (#14424)

Optional tests should not block releases.

There are two groups of optional tests:
1. Canary type tests
2. Tests that send data to sentry

IMHO both of these can be skipped on release branches, as failure in
either of them should not affect the release. They will (for now) still
run on develop, we can revisit this if we want.

.github/workflows/build.yml

@@ -795,7 +795,8 @@ jobs:
     # - The build job was successful, not skipped
     # - AND if the profiling node bindings were either successful or skipped
     if: |
-      always() && needs.job_build.result == 'success' &&
+      always() &&
+      needs.job_build.result == 'success' &&
       (needs.job_compile_bindings_profiling_node.result == 'success' || needs.job_compile_bindings_profiling_node.result == 'skipped')
     needs: [job_get_metadata, job_build, job_compile_bindings_profiling_node]
     runs-on: ubuntu-20.04-large-js
@@ -981,13 +982,16 @@ jobs:
           directory: dev-packages/e2e-tests
           token: ${{ secrets.CODECOV_TOKEN }}
 
+  # - We skip optional tests on release branches
   job_optional_e2e_tests:
     name: E2E ${{ matrix.label || matrix.test-application }} Test
     # We only run E2E tests for non-fork PRs because the E2E tests require secrets to work and they can't be accessed from forks
     # We need to add the `always()` check here because the previous step has this as well :(
     # See: https://github.com/actions/runner/issues/2205
     if:
-      always() && needs.job_e2e_prepare.result == 'success' &&
+      always() &&
+      needs.job_get_metadata.outputs.is_release != 'true' &&
+      needs.job_e2e_prepare.result == 'success' &&
       needs.job_e2e_prepare.outputs.matrix-optional != '{"include":[]}' &&
       (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) &&
       github.actor != 'dependabot[bot]'