deps: Remove Python 3.7 and 3.8 as supported runtimes (#1395)

* deps: Remove Python 3.7 and 3.8 as supported runtimes

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix build

* update required check

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: rahul2393

.github/sync-repo-settings.yaml

@@ -11,5 +11,5 @@ branchProtectionRules:
     - 'Kokoro system-3.12'
     - 'cla/google'
     - 'Samples - Lint'
-    - 'Samples - Python 3.8'
+    - 'Samples - Python 3.9'
     - 'Samples - Python 3.12'

.github/workflows/presubmit.yaml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install nox
         run: python -m pip install nox
       - name: Check formatting
@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - name: Checkout code