workflows: Switch utility workflows to using ubuntu-22.04

We want to use a stable version of ubuntu, not ubuntu-latest which can
change unexpectedly. This switches all the other (non-test) workflows to
use ubuntu-22.04

.github/workflows/coverity_scan.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   coverity_scan:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Clone repository
         uses: actions/checkout@v4

.github/workflows/create-tag.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   tag-and-push:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Even or odd week

.github/workflows/pr_best_practices.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   pr-best-practices:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: PR best practice check
         uses: osbuild/pr-best-practices@main

.github/workflows/release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Upstream release
         uses: osbuild/release-action@main

.github/workflows/stale-cleanup.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   stale:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       issues: write
       pull-requests: write

.github/workflows/trigger-gitlab.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   trigger-gitlab:
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       IMAGEBUILDER_BOT_GITLAB_SSH_KEY: ${{ secrets.IMAGEBUILDER_BOT_GITLAB_SSH_KEY }}
       GITLAB_TOKEN: ${{ secrets.IMAGEBUILDER_BOT_GITLAB_PIPELINE_TRIGGER_TOKEN }}