Custom app grouping

[vikramdevtron]

Description

In app grouping, there are multiple apps rendering for one environment, sometimes users just want some group of apps only. He can do this now but can’t save that filter.

Users can create filters for specific environments, multiple filters can be added within an environment. Filters are app groups (one or more than one app’s).

Tech Doc and Test Scenarios
https://docs.google.com/document/d/1URKOxV_cKld3WG99GEKKMsS0WbvbRzkQexVcP5nQbf8/edit

Fixes #https://dev.azure.com/DevtronLabs/Devtron/_workitems/edit/2698

How Has This Been Tested?

• Tested scenarios

Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR requires documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested it for all user roles.
• I have added all the required unit/api test cases.

Does this PR introduce a user-facing change?

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
25 Code Smells

No Coverage information
26.6% Duplication