ci: fix ubuntu version to 22.04 (#321)

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.yml

@@ -54,7 +54,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.7"
+          python-version: "3.12"
       - uses: pre-commit/[email protected]
 
   semgrep:
@@ -63,7 +63,7 @@ jobs:
       SEMGREP_KEY: ${{ secrets.SEMGREP_PUBLISH_TOKEN }}
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs:
       - fossa-scan
       - compliance-copyrights
@@ -86,7 +86,7 @@ jobs:
 
   test-unit:
     name: test-unit ${{ matrix.python-version }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     continue-on-error: true
     strategy:
       matrix:
@@ -108,7 +108,7 @@ jobs:
           poetry run pytest tests/unit
 
   integration-tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs:
       - meta
       - test-unit
@@ -168,7 +168,7 @@ jobs:
       - build
       - test-unit
       - integration-tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with: