feat: Review config changes before deployment

[prakash100198]

Description

Currently we don’t review configuration changes before deploying any image after building an image, currently we only support reviewing config changes when we do rollbacks on the basis of 3 parameters, 1. Last saved config. 2. Last deployed config , and 3. Config deployed with selected image. But we want to have the same kind of feature when we click on Select Image -> Deploy, but there the review of config will only be on the basis of two parameters, i.e 1. Last saved config. 2. Last deployed config.
Design for the same is shown in the below screenshots for reference:-

fixes #2024

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

• Test case A :- 1. Created a workflow with one cd and tested the code working fine in that case. 2. Created multiple workflow with multiple combinations of cd pipelines configured, one cd after another cd and with parallel cd also, code working fine in that case too. 2. Tested the comparison of config in case of Select Image -> compare diff between last saved and last deployed, working in that case too. 4. Tested a corner case when there is no last deployed image, there will not be any diff shown, user can only review the last saved config in that case and deploy via only last saved config.

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]

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