Draft: Gl 1455 user mapping

• Added docs
• Implement the related Asconfig parser ( and implement the AS config parser code ) # related to: https://github.com/BSC-ES/autosubmit-config-parser/pull/54
• Implement the related part
• Pytest
• Merge and update Asconfigparser version https://github.com/BSC-ES/autosubmit-config-parser/pull/54
• Manual test that I can't do as I don't have tsuite access (@bdepaula )
• make watch docs successful ( syntax error somewhere )