feat: Support for OCI charts pull & deploy in EA mode

[Ash-exp]

Description

Currently OCI registries can be added but it can be only added through chart-store >> source >> OCI Registries and there isn't any visibility of OCI registries in Global Configs
In this PR we provided the capability to pull OCI charts in EA mode and deploy it directly without having the CI/CD module.

Fixes #4261

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

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?

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

No Coverage information
3.2% Duplication

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