Add CORS to Azure bucket storage

[brycehuang30]

Changes

This PR adds blob storage CORS config for Azure cloud, to codify the existing CORS + required CORS for enabling partial read from blob object (to support Optimized File Viewer).

S3 config is updated here: anyscale/terraform-aws-anyscale-cloudfoundation-modules#86
GCS config already has it; doesn't require update: https://github.com/anyscale/terraform-google-anyscale-cloudfoundation-modules/blob/main/modules/google-anyscale-cloudstorage/variables.tf#L233-L240

Test

$ terraform plan
...

      + blob_properties {
          + change_feed_enabled      = false
          + default_service_version  = (known after apply)
          + last_access_time_enabled = false
          + versioning_enabled       = false

          + cors_rule {
              + allowed_headers    = [
                  + "*",
                ]
              + allowed_methods    = [
                  + "GET",
                  + "POST",
                  + "PUT",
                  + "HEAD",
                  + "DELETE",
                ]
              + allowed_origins    = [
                  + "https://*.anyscale.com",
                ]
              + exposed_headers    = [
                  + "Accept-Ranges",
                  + "Content-Range",
                  + "Content-Length",
                ]
              + max_age_in_seconds = 0
            }
        }
...

Pull request checklist

Please check if your PR fulfills the following requirements:

• pre-commit has been run
• Tests for the changes have been added (for bug fixes / features)
• All tests passing
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Pull Request Type

• Bugfix
• New feature
• Refactoring (no functional changes)
• Documentation change
• Other (please describe):

Does this introduce a breaking change?

• Yes
• No

Other information

[brent-anyscale]

LGTM