ci: fix ubuntu version to 22.04 (#440)

This PR sets ubuntu version to 22.04 for scripts run with python 3.7.
Reference:
[ADDON-75861](https://splunk.atlassian.net/browse/ADDON-75861)

.github/workflows/build-test-release.yaml

@@ -58,7 +58,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
-          python-version: ${{ env.PYTHON_VERSION }}
+          python-version: "3.12"
       - uses: pre-commit/[email protected]
 
   semgrep:
@@ -67,7 +67,7 @@ jobs:
       SEMGREP_KEY: ${{ secrets.SEMGREP_PUBLISH_TOKEN }}
 
   run-unit-tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
@@ -88,7 +88,7 @@ jobs:
 
   build:
     name: build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs:
       - fossa-scan
       - compliance-copyrights
@@ -128,7 +128,7 @@ jobs:
     needs:
       - meta
       - build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     if: |
       !contains(github.event.issue.labels.*.name, 'skip-ui-tests')
     permissions:
@@ -198,7 +198,7 @@ jobs:
       - build
       - run-ui-tests
       - run-unit-tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with: