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

------

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

---------

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

routers/api/v1/repo/file.go

@@ -201,7 +201,7 @@ func GetRawFileOrLFS(ctx *context.APIContext) {
 		return
 	}
 
-	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(), blob.Name())
 		if u != nil && err == nil {
@@ -326,7 +326,7 @@ func download(ctx *context.APIContext, archiveName string, archiver *repo_model.
 		archiver.CommitID, archiver.CommitID))
 
 	rPath := archiver.RelativePath()
-	if setting.RepoArchive.Storage.MinioConfig.ServeDirect {
+	if setting.RepoArchive.Storage.ServeDirect() {
 		// If we have a signed url (S3, object storage), redirect to this directly.
 		u, err := storage.RepoArchives.URL(rPath, downloadName)
 		if u != nil && err == nil {