Allow to disable uid transformation for an IDP

[jusabatier]

This is a better approach for #256

We can only target a single IDP by it's identifier :

georchestra:
  gateway:
    security:
      # You can disable UID transformation for an IDP by its identifier
      # This lead to not prefixing or sanitize the UID from this IDP
      disableUidTransformation: 'icu'

will target only IDP with identifier icu.

The targeted IDP will perform mapping on RAW uids, it's necessary when you use same LDAP for geOrchestra and OAuth2 provider (Keycloak for example).

@pmauduit @f-necas

[f-necas]

Awesome thx ! Way cleaner than the other PR 👍🏼

[github-actions]

💔 All backports failed

Status	Branch	Result
❌	3.0.x	Backport failed because of merge conflicts

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