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/api/actions/artifactsv4.go

@@ -448,7 +448,7 @@ func (r *artifactV4Routes) getSignedArtifactURL(ctx *ArtifactContext) {
 
 	respData := GetSignedArtifactURLResponse{}
 
-	if setting.Actions.ArtifactStorage.MinioConfig.ServeDirect {
+	if setting.Actions.ArtifactStorage.ServeDirect() {
 		u, err := storage.ActionsArtifacts.URL(artifact.StoragePath, artifact.ArtifactPath)
 		if u != nil && err == nil {
 			respData.SignedUrl = u.String()