[pre-commit - branch builds] Run in nightly mode (#30155)

* First commit

* Add demistomock.py to exclude in mypy

* Revert mistake

---------

Co-authored-by: Koby Meir <[email protected]>

Author: mmhw

.github/workflows/pre-commit.yml

@@ -36,7 +36,7 @@ jobs:
     - name: run pre-commit
       run: |
         source .venv/bin/activate
-        demisto-sdk pre-commit -g --unit-test --validate --no-secrets --show-diff-on-failure --verbose
+        demisto-sdk pre-commit -g --unit-test --validate --no-secrets --show-diff-on-failure --verbose --mode=nightly
 
     - name: Publish Test Report
       uses: mikepenz/action-junit-report@v3