[CI] Run CI on all PRs (#4917)

Currently PRs only get CI when the base branch is main or starts with
`dev-` but this changes it to run on all PRs which works better for when
using `git-pr-chain` where the base branch usually isn't main.

.github/workflows/integration-tests.yml

@@ -10,8 +10,7 @@ name: Integration Tests
 on:
   workflow_dispatch:
   pull_request:
-    # You can name your branch dev-foo to get CI runs.
-    branches: [main, 'dev-**']
+    branches-ignore: ['llvm-**']
   merge_group:
     branches: [main, 'dev-**']
     types: [checks_requested]

.github/workflows/integration-tests.yml.in

@@ -9,8 +9,7 @@ name: Integration Tests
 on:
   workflow_dispatch:
   pull_request:
-    # You can name your branch dev-foo to get CI runs.
-    branches: [main, 'dev-**']
+    branches-ignore: ['llvm-**']
   merge_group:
     branches: [main, 'dev-**']
     types: [checks_requested]