feat: Allow to enable/disable working branch for all scm plugins

[olblak]

Fix #1139

Test

To test this pull request, you can execute any manifest with the workingbranch set to false or true:

./bin/updatecli apply --config updatecli/updatecli.d/golangci-lint.yaml --push=false
cd /tmp/updatecli/github/updatecli/updatecli 
git branch # should show main if workingbranch set to true

Additional Information

Tradeoff

Potential improvement