feat: add azure remote cache

[arbreezy]

Closes #

📑 Description

PR refactors remoteCache CR spec and adds support for azure storage container

We only support Service Principal's Azure authentication mechanism, if we see that users want more flexibility we can extend the ways to authenticate to Azure in the operator..

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information

new spec is

...
remoteCache:
  credentials:
      name: k8sgpt-sample-cache-secret
  s3:
    bucketName:
    region:
  azure:
    storageAccount:
    containerName:
...

[AlexsJones]

LGTM but we need to refactor the config API soon it's getting a bit unwieldy