fix: bitbucket gitops config fixes

[vikramdevtron]

Description

Issue 1468: Bitbucket gitops client missing config & refactoring

https://docs.google.com/document/d/1zR1De3uE9JKzZr9tsjTGtoQOqExD8UUtbD_xYHLfBzo/edit?usp=sharing

Fixes https://dev.azure.com/DevtronLabs/Devtron/_workitems/edit/1468

How Has This Been Tested?

• 1) Make sure no bitbucket gitops configured, remove from database if already exists with disabled state. go ahead with other gitops configurations.
• 2) Create devtron apps [Create Deployment template, Cd pipeline create via ACD, CD Trigger], also [Update Cd pipeline, re Trigger, Delete ]
• 3) Create helm apps [Deploy via ACD], also update and Deploy and Delete.
• 4) Now change gitops global config, add Bitbucket configs and validate and save.
• 5) Now try to repeat step 2 and 3 for New apps.

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?

[gitguardian]

⚠️ GitGuardian has uncovered 5 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	Secret	Commit	Filename
141558	Generic High Entropy Secret	c2be4ab	scripts/devtron-reference-helm-charts/deployment-chart_1-0-0/env-values.yaml	View secret
2763127	Generic High Entropy Secret	c2be4ab	scripts/devtron-reference-helm-charts/deployment-chart_1-0-0/secrets-test-values.yaml	View secret
5236769	Generic High Entropy Secret	c2be4ab	scripts/devtron-reference-helm-charts/deployment-chart_1-0-0/test-values.json	View secret
141558	Generic High Entropy Secret	3f92ede	scripts/devtron-reference-helm-charts/cronjob-chart_1-4-0/env-values.yaml	View secret
2763127	Generic High Entropy Secret	3f92ede	scripts/devtron-reference-helm-charts/cronjob-chart_1-4-0/secrets-test-values.yaml	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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