[4.9.x] fix: filter user groups by env scope in query parameter

[mergify]

This is an automatic copy of pull request #13890 done by Mergify.

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Issue

https://gravitee.atlassian.net/browse/APIM-10981

Description

The UserResource.getUserGroups endpoint now correctly filters groups by environment when the 'q' query parameter is provided with valid environmentId.
Sample:
management/organizations/{orgID}/users/{userID}/groups?q={envID} => filters data based on envID
management/organizations/{orgID}/users/{userID}/groups => provides full list of groups for the user

The issue was that old API is already deprecated GET management/organizations/{orgId}/environments/{envId}/users/{userId}/groups but if user wants to filter data based on the envId then there was no option to do so.

Changes:

• Added GroupService.findByUserAndEnvironment method to filter groups by environment ID
• Implemented environment-based filtering logic in GroupServiceImpl
• Updated UserResource to call findByUserAndEnvironment with environment id when provided in query param.
• Added comprehensive test coverage.

Previously, the endpoint returned all organization groups and no option was available for end user to filter data based on environment id.

Screen.Recording.2025-11-02.at.12.19.35.PM.mov

Updated fix with QUERY PARAM:

Screen.Recording.2025-11-11.at.9.59.02.PM.mov

Additional context

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