feat: upload and download logs/artifact from blob storage configured in external cluster

[prakash100198]

Description

Currently, we support pushing and getting logs , caches and artifacts from the blob storage configured in the cluster where devtron is installed but when I'm using system executor, we should let people push and get logs, caches and artifacts in external cluster env in blob storage configured in ext cluster. This pr aims at introducing that feature.

Fixes #4184

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

1. aws configured in cluster where devtron is installed and azure installed in ext cluster.
2. aws configured in cluster where devtron is installed and aws installed in ext cluster, using user access key and secret key.
3. aws configured in ext cluster using IAM role
4. aws configured in cluster where devtron is installed and gcp installed in ext cluster.

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]

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