Run non larger-runner CI tests on all PRs (#3733)

### Description

- Run tests (except larger-runner jobs) on PRs where base branch is not
main

---------

Co-authored-by: Le Yu <leyu00@gmail.com>

.github/workflows/test.yml

@@ -5,7 +5,8 @@ on:
   push:
     branches: [main]
   pull_request:
-    branches: [main]
+    branches:
+      - '*' # run against all branches
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
@@ -175,6 +176,7 @@ jobs:
 
   e2e-matrix:
     runs-on: larger-runner
+    if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.base_ref == 'main')
     needs: [yarn-build]
     strategy:
       matrix:
@@ -264,6 +266,7 @@ jobs:
 
   cli-e2e:
     runs-on: larger-runner
+    if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.base_ref == 'main')
     needs: [yarn-build]
     strategy:
       matrix: