feat: App workflow and env overrides Clone and Delete api.

[kartik-579]

Description

• App workflow clone api
• App env overrides allow by api
• Bulk delete complete app workflow including nodes, CI and CD.

Fixes #2559 #2577

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• App workflow clone by api
• App env overrides by api
• App workflow and overrides fetch api
• Bulk app workflow deletes

Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR require 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