Append Blob Tests (Azure#20399)

* Adding tests for appendblob

* Updating unrecorded tests and fixing tests

* Adding deprecated message on unsupported apis

* Update tests

* update

* Updating docs references on deprecated apis

* Fix flaky test

* Update sdk/storage/azblob/appendblob/client.go

Co-authored-by: Sourav Gupta <[email protected]>

* Update sdk/storage/azblob/appendblob/client.go

Co-authored-by: Sourav Gupta <[email protected]>

* Fixing flaky tests, again...

---------

Co-authored-by: Sourav Gupta <[email protected]>

Author: siminsavani-msft

sdk/storage/azblob/appendblob/client.go

@@ -8,6 +8,7 @@ package appendblob
 
 import (
 	"context"
+	"errors"
 	"io"
 	"os"
 	"time"
@@ -255,14 +256,10 @@ func (ab *Client) SetLegalHold(ctx context.Context, legalHold bool, options *blo
 	return ab.BlobClient().SetLegalHold(ctx, legalHold, options)
 }
 
-// SetTier operation sets the tier on a blob. The operation is allowed on a page
-// blob in a premium storage account and on a block blob in a blob storage account (locally
-// redundant storage only). A premium page blob's tier determines the allowed size, IOPS, and
-// bandwidth of the blob. A block blob's tier determines Hot/Cool/Archive storage type. This operation
-// does not update the blob's ETag.
-// For detailed information about block blob level tiering see https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-storage-tiers.
+// SetTier
+// Deprecated: SetTier only works for page blob in premium storage account and block blob in blob storage account.
 func (ab *Client) SetTier(ctx context.Context, tier blob.AccessTier, o *blob.SetTierOptions) (blob.SetTierResponse, error) {
-	return ab.BlobClient().SetTier(ctx, tier, o)
+	return blob.SetTierResponse{}, errors.New("Operation will not work on this blob type. SetTier only works for page blob in premium storage account and block blob in blob storage account.")
 }
 
 // SetExpiry operation sets an expiry time on an existing blob. This operation is only allowed on Hierarchical Namespace enabled accounts.
@@ -326,10 +323,10 @@ func (ab *Client) GetTags(ctx context.Context, o *blob.GetTagsOptions) (blob.Get
 	return ab.BlobClient().GetTags(ctx, o)
 }
 
-// CopyFromURL synchronously copies the data at the source URL to a block blob, with sizes up to 256 MB.
-// For more information, see https://docs.microsoft.com/en-us/rest/api/storageservices/copy-blob-from-url.
+// CopyFromURL
+// Deprecated: CopyFromURL works only with block blob
 func (ab *Client) CopyFromURL(ctx context.Context, copySource string, o *blob.CopyFromURLOptions) (blob.CopyFromURLResponse, error) {
-	return ab.BlobClient().CopyFromURL(ctx, copySource, o)
+	return blob.CopyFromURLResponse{}, errors.New("Operation will not work on this blob type. CopyFromURL works only with block blob.")
 }
 
 // Concurrent Download Functions -----------------------------------------------------------------------------------------