Enable cancel-in-progress for PR runs in all CI workflows

Update concurrency settings to cancel outdated workflow runs when new
commits are pushed to a PR, while allowing branch builds to complete:
- codestyle.yml
- codeql.yml
- groovy-joint-workflow.yml
- rat.yml

Author: jamesfredley

.github/workflows/codeql.yml

@@ -37,7 +37,7 @@ on:
 # queue jobs and only allow 1 run per branch due to the likelihood of hitting GitHub resource limits
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: false
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 jobs:
   analyze:
     name: Analyze

.github/workflows/codestyle.yml

@@ -23,7 +23,7 @@ on:
 # queue jobs and only allow 1 run per branch due to the likelihood of hitting GitHub resource limits
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: false
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 jobs:
   check_core_projects:
     name: "Core Projects"

.github/workflows/groovy-joint-workflow.yml

@@ -25,7 +25,7 @@ on:
 # queue jobs and only allow 1 run per branch due to the likelihood of hitting GitHub resource limits
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: false
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 permissions:
   contents: read
 jobs:

.github/workflows/rat.yml

@@ -29,7 +29,7 @@ on:
 # queue jobs and only allow 1 run per branch due to the likelihood of hitting GitHub resource limits
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: false
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 jobs:
   rat-audit:
     runs-on: ubuntu-latest