Azure blob storage support (#30995)

This PR implemented object storages(LFS/Packages/Attachments and etc.)
for Azure Blob Storage. It depends on azure official golang SDK and can
support both the azure blob storage cloud service and azurite mock
server.

Replace #25458
Fix #22527 

- [x] CI Tests
- [x] integration test, MSSQL integration tests will now based on
azureblob
  - [x] unit test 
- [x] CLI Migrate Storage
- [x] Documentation for configuration added

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TODO (other PRs):
- [ ] Improve performance of `blob download`.

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Co-authored-by: yp05327 <576951401@qq.com>

services/lfs/server.go

@@ -453,7 +453,7 @@ func buildObjectResponse(rc *requestContext, pointer lfs_module.Pointer, downloa
 
 		if download {
 			var link *lfs_module.Link
-			if setting.LFS.Storage.MinioConfig.ServeDirect {
+			if setting.LFS.Storage.ServeDirect() {
 				// If we have a signed url (S3, object storage), redirect to this directly.
 				u, err := storage.LFS.URL(pointer.RelativePath(), pointer.Oid)
 				if u != nil && err == nil {