[MINOR][INFRA] Do not cancel GHA jobs on committing to main/branch-* branches

### What changes were proposed in this pull request?

As the title.

### Why are the changes needed?

To avoid canceling GHA jobs after quickly merging more than one PRs in a short time.

<img width="867" alt="image" src="https://github.com/user-attachments/assets/fe34ee02-3dd5-4b10-89f2-3826031d1bf4" />

### Does this PR introduce _any_ user-facing change?

No, dev-only.

### How was this patch tested?

Monitor after merging.

Closes #3235 from pan3793/minor-cancel-ci.

Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>

.github/workflows/license.yml

@@ -26,7 +26,7 @@ on:
       - branch-*
 
 concurrency:
-  group: license-${{ github.ref }}
+  group: license-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:

.github/workflows/style.yml

@@ -28,7 +28,7 @@ on:
       - branch-*
 
 concurrency:
-  group: style-${{ github.ref }}
+  group: style-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:

.github/workflows/web_lint.yml

@@ -28,7 +28,7 @@ on:
       - branch-*
 
 concurrency:
-  group: style-web-${{ github.ref }}
+  group: style-web-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs: