Dashboard gives a generic error message when duplicate bucket is created in multi-cloud

[asifdxtreme]

Issue/Feature Description: Dashboard gives a generic error message while creating bucket with the exisiting bucket name.

Why this issue to fixed / feature is needed(give scenarios or use cases): Error seems to be generic and confuses the user to believe something is wrong with the configuration.

How to reproduce, in case of a bug: Create a mult-cloud bucket with the same name which exisit already in cloud.

[asifdxtreme]

A follow up PR can be raised in multi-cloud if it need changes in the backend

[anvithks]

@asifdxtreme I checked this and see that the dashboard receives a generic error from the API, which is shown to the user.

The logs from the S3 container show that the cloud returns an error 409 as the bucket name was already present on the cloud.

[2021-04-09T08:55:10+05:30] [ERROR] [/root/gopath/src/github.com/sodafoundation/multi-cloud/s3/pkg/datastore/aws/aws.go] [aws.(*AwsAdapter).BucketCreate():77] [PID:8] the create bucket failed in aws-s3 service with err:%sBucketAlreadyOwnedByYou: Your previous request to create the named bucket succeeded and you already own it.
	status code: 409, request id: 56R6N8R9QXAJB7SJ, host id: gmN8PFktES89VnRnM2jnFSw0DuSvP5yDtY2CbjZUN6Qd6HF2yL+wL0rQLhwrDZBvF/6dWAluA4Q=

If this error can be send through in the API response then we can display the same.