feat: run both ucc and legacy modinput tests (#343)

This PR adds the feature to run the `ucc_modinput_functional` tests
seperately from `modinput_functional` (Legacy).

Reference: https://splunk.atlassian.net/browse/ADDON-75556

Test run: 

https://github.com/splunk/splunk-add-on-for-salesforce/actions/runs/11473918131

https://github.com/splunk/splunk-add-on-for-google-cloud-platform/actions/runs/12067263557

---------

Co-authored-by: mkolasinski-splunk <105011638+mkolasinski-splunk@users.noreply.github.com>
Co-authored-by: Artem Rys <rysartem@gmail.com>
Co-authored-by: kdoroszko-splunk <kdoroszko@splunk.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: kgwizdz-splunk <163291633+kgwizdz-splunk@users.noreply.github.com>
Co-authored-by: Adam Wownysz <150446614+awownysz-splunk@users.noreply.github.com>
Co-authored-by: Marcin Bruzda <94437843+mbruzda-splunk@users.noreply.github.com>
Co-authored-by: harshilgajera-crest <69803385+harshilgajera-crest@users.noreply.github.com>

.github/pull_request_template.md

@@ -0,0 +1,16 @@
+### Description
+
+(PR description goes here)
+
+### Checklist
+
+- [ ] `README.md` has been updated or is not required
+- [ ] push trigger tests
+- [ ] manual release test
+- [ ] automated releaes test
+- [ ] pull request trigger tests
+- [ ] schedule trigger tests
+- [ ] workflow errors/warnings reviewed and addressed
+
+### Testing done 
+(for each selected checkbox, the corresponding test results link should be listed here)

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

@@ -25,7 +25,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   pre-commit:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5