feat: add endpoint parameter to azure-blob cas-backend

[JeffResc]

Adds --endpoint option to chainloop cas-backend add azure-blob command.

For example:

./chainloop cas-backend add azure-blob \
  --client-id [CLIENT_ID] \
  --client-secret [CLIENT_SECRET] \
  --container [CONTAINER] \
  --storage-account [STORAGE_ACCOUNT] \
  --tenant [TENANT] \
  --name az-blob \
  --endpoint blob.core.usgovcloudapi.net

Resolves #2495

[migmartri]

Awesome, we'll take a look at it shortly, note that some automated tests are failing.

Just to confirm, did you manage to make this feature work end-to-end locally?

Thanks!

[jiparis]

Thanks for the contribution @JeffResc, it looks great. For the CI job to pass, you might need to run go generate ./... in app/cli folder to generate the CLI documentation.

[JeffResc]

Just to confirm, did you manage to make this feature work end-to-end locally?

Yes I did, I was able to successfully add the cas-backend and push attestations to it

For the CI job to pass, you might need to run go generate ./... in app/cli folder to generate the CLI documentation.

Done, hopefully that resolves the CI errors