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>

routers/web/repo/download.go

@@ -53,8 +53,8 @@ func ServeBlobOrLFS(ctx *context.Context, blob *git.Blob, lastModified *time.Tim
 			return nil
 		}
 
-		if setting.LFS.Storage.MinioConfig.ServeDirect {
-			// If we have a signed url (S3, object storage), redirect to this directly.
+		if setting.LFS.Storage.ServeDirect() {
+			// If we have a signed url (S3, object storage, blob storage), redirect to this directly.
 			u, err := storage.LFS.URL(pointer.RelativePath(), blob.Name())
 			if u != nil && err == nil {
 				ctx.Redirect(u.String())