Fix #1399

Today temporary working branch looks like

updatecli_<the targeted branch>_<pipelineid>

This pullrequest allows to override the default separator from _ to whatever defined by the parameter workingbranchseparator
The prefix updatecli_ can also be replace by setting the parameter workingbranchprefix:

For example

  scms:
    default:
      kind: github
      spec:
        branch: "{{ .scm.branch }}"
        email: "{{ .scm.email }}"
        owner: "{{ .scm.owner }}"
        repository: "{{ .scm.repository }}"
        token: '{{ requiredEnv "GITHUB_TOKEN" }}'
        user: "{{ .scm.user }}"
        username: '{{ requiredEnv "GITHUB_ACTOR" }}'
        workingbranchprefix: "deps"
        workingbranchseparator: '/' 
      disabled: false

Test

Test manually

Additional Information

Checklist

• I have updated the documentation via pull request in website repository.

Tradeoff

I see two risks here that are not Updatecli related.

1. Reusing an existing branch not created by Updatecli and resetting its content
2. Failing to create a branch. For example, Updatecli won't be able to create the branch deps/main/bumpversion if there is already a branch named deps which It's a git limitation

Potential improvement