[BUG] BlobBaseClient.GetProperties() returned "IsLatestVersion" is false, even the blob is current version

[blueww]

Describe the bug
"Azure.Storage.Blobs 12.9.0-beta.4" has a regression.
I don't meet this on "Azure.Storage.Blobs 12.8.0"

BlobBaseClient.GetProperties() returned "IsLatestVersion" is false, even the blob is current version.

Expected behavior
BlobBaseClient.GetProperties() returned "IsLatestVersion" is true, when the blob is current version.

Actual behavior (include Exception or Stack Trace)
BlobBaseClient.GetProperties() returned "IsLatestVersion" is false, even the blob is current version.

In my test, following responds return from server， note it contains x-ms-is-current-version: true:

HEAD https://[accountname].blob.core.windows.net/container637577201881923669/bb.txt HTTP/1.1
x-ms-version: 2020-08-04
Accept: application/xml
x-ms-client-request-id: f6baaead-8d4a-4496-a1e5-141f47894812
x-ms-return-client-request-id: true
User-Agent: azsdk-net-Storage.Blobs/12.9.0-beta.4 (.NET Framework 4.8.4300.0; Microsoft Windows 10.0.19043 )
x-ms-date: Thu, 27 May 2021 06:46:33 GMT
Authorization: SharedKey [accountname]:[hidden]
Host: accountname.blob.core.windows.net
Connection: Keep-Alive


HTTP/1.1 200 OK
Content-Length: 2097152
Content-Type: application/octet-stream
Content-MD5: bqUxW6Bsbx3/sdrQQJXong==
Last-Modified: Thu, 27 May 2021 05:50:09 GMT
Accept-Ranges: bytes
ETag: "0x8D920D3495E6293"
Server: Windows-Azure-Blob/1.0 Microsoft-HTTPAPI/2.0
x-ms-request-id: 92dc03f4-801e-0093-41c4-5201c8000000
x-ms-client-request-id: f6baaead-8d4a-4496-a1e5-141f47894812
x-ms-version: 2020-08-04
x-ms-version-id: 2021-05-27T05:50:09.0766526Z
x-ms-is-current-version: true
x-ms-creation-time: Thu, 27 May 2021 05:50:08 GMT
x-ms-lease-status: unlocked
x-ms-lease-state: available
x-ms-blob-type: BlockBlob
x-ms-copy-id: 131d6e7e-344c-4db2-aef7-949ff3d99aee
x-ms-copy-source: [hidden]
x-ms-copy-status: success
x-ms-copy-progress: 2097152/2097152
x-ms-copy-completion-time: Thu, 27 May 2021 05:50:09 GMT
x-ms-server-encrypted: true
x-ms-access-tier: Hot
x-ms-access-tier-inferred: true
x-ms-last-access-time: Thu, 27 May 2021 05:50:09 GMT
Date: Thu, 27 May 2021 06:46:34 GMT

But "IsLatestVersion" is false in SDK ourput BlobProperties.

To Reproduce

Run following code on an account enabled versioning.
(Need fill the correct blob Uri , account name/key before run it.)

            BlobBaseClient blobclient = new BlobBaseClient(new Uri("https://accountname.blob.core.windows.net/containername/blobname"), 
                new StorageSharedKeyCredential(accountname, key));
            BlobProperties blobProperties =  blobclient.GetProperties().Value;
            Console.WriteLine(blobProperties.IsLatestVersion);

Environment:

• Name and version of the Library package used:
  "Azure.Storage.Blobs 12.9.0-beta.4"
• Hosting platform or OS and .NET runtime version (dotnet --info output for .NET Core projects): [e.g. Azure AppService or Windows 10 .NET Framework 4.8]

.NET Core SDK (reflecting any global.json):
 Version:   2.2.108
 Commit:    33ed5b90ce

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.18363
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.2.108\

Host (useful for support):
  Version: 2.2.6
  Commit:  7dac9b1b51

.NET Core SDKs installed:
  2.2.108 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

• IDE and version : [e.g. Visual Studio 16.3]
  VS 15.7.4

[blueww]

@seanmcc-msft
Would you please help to look at this issue?