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>

cmd/migrate_storage.go

@@ -40,7 +40,7 @@ var CmdMigrateStorage = &cli.Command{
 			Name:    "storage",
 			Aliases: []string{"s"},
 			Value:   "",
-			Usage:   "New storage type: local (default) or minio",
+			Usage:   "New storage type: local (default), minio or azureblob",
 		},
 		&cli.StringFlag{
 			Name:    "path",
@@ -48,6 +48,7 @@ var CmdMigrateStorage = &cli.Command{
 			Value:   "",
 			Usage:   "New storage placement if store is local (leave blank for default)",
 		},
+		// Minio Storage special configurations
 		&cli.StringFlag{
 			Name:  "minio-endpoint",
 			Value: "",
@@ -96,6 +97,32 @@ var CmdMigrateStorage = &cli.Command{
 			Value: "",
 			Usage: "Minio bucket lookup type",
 		},
+		// Azure Blob Storage special configurations
+		&cli.StringFlag{
+			Name:  "azureblob-endpoint",
+			Value: "",
+			Usage: "Azure Blob storage endpoint",
+		},
+		&cli.StringFlag{
+			Name:  "azureblob-account-name",
+			Value: "",
+			Usage: "Azure Blob storage account name",
+		},
+		&cli.StringFlag{
+			Name:  "azureblob-account-key",
+			Value: "",
+			Usage: "Azure Blob storage account key",
+		},
+		&cli.StringFlag{
+			Name:  "azureblob-container",
+			Value: "",
+			Usage: "Azure Blob storage container",
+		},
+		&cli.StringFlag{
+			Name:  "azureblob-base-path",
+			Value: "",
+			Usage: "Azure Blob storage base path",
+		},
 	},
 }
 
@@ -228,6 +255,18 @@ func runMigrateStorage(ctx *cli.Context) error {
 					BucketLookUpType:   ctx.String("minio-bucket-lookup-type"),
 				},
 			})
+	case string(setting.AzureBlobStorageType):
+		dstStorage, err = storage.NewAzureBlobStorage(
+			stdCtx,
+			&setting.Storage{
+				AzureBlobConfig: setting.AzureBlobStorageConfig{
+					Endpoint:    ctx.String("azureblob-endpoint"),
+					AccountName: ctx.String("azureblob-account-name"),
+					AccountKey:  ctx.String("azureblob-account-key"),
+					Container:   ctx.String("azureblob-container"),
+					BasePath:    ctx.String("azureblob-base-path"),
+				},
+			})
 	default:
 		return fmt.Errorf("unsupported storage type: %s", ctx.String("storage"))
 	}