Add new rule to catch syntax error e.g. "elif" instead of "elseif"

Summary of the new feature

Try formulating it in user story style (if applicable):
'As a python and powershell developer I want ScriptAnalyzer to detect when I use elif (python) instead of elseif (powershell) so that the ci warns me about invalid statements and I can correct the code.'

Proposed technical implementation details (optional)

For powershell modules we need an additional ci check. Currently syntax errors are not always covered. The ci for example does currently not cover usage of elif instead of elseif (former is python later is powershell).

Example shippables: https://app.shippable.com/github/ansible/ansible/runs/133592/1/console (source)
It erroneously reports unused variables instead of a syntax error.

What is the latest version of PSScriptAnalyzer at the point of writing

Commencez par examiner les vérifications CI du module PowerShell et reproduisez le cas signalé en utilisant elif là où PowerShell attend elseif. Comparez le diagnostic obtenu avec le rapport d’erreur de syntaxe attendu ; le travail est terminé lorsque cette mauvaise utilisation est détectée par CI au lieu d’être signalée uniquement comme des variables inutilisées.