[BUG] EncryptedBlobAsyncClient uses block() in async method

[weidongxu-microsoft]

Describe the bug
EncryptedBlobAsyncClient uses block() in async method
https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/storage/azure-storage-blob-cryptography/src/main/java/com/azure/storage/blob/specialized/cryptography/EncryptedBlobAsyncClient.java#L448-L449

It would cause runtime error

block()/blockFirst()/blockLast() are blocking, which is not supported in thread reactor-http-nio-5

Exception or Stack Trace
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To Reproduce
Steps to reproduce the behavior:
Config with AsyncKeyEncryptionKey and upload some file.

encryptedBlobClient.uploadFromFile(file2Path);

Code Snippet
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Expected behavior
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Setup (please complete the following information):

• OS: [e.g. iOS] Windows
• IDE : [e.g. IntelliJ] IntelliJ
• Version of the Library used 12.7.0

Additional context
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Information Checklist
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• Bug Description Added
• Repro Steps Added
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[rickle-msft]

@weidongxu-microsoft Thank you for pointing this out. It looks like you are correct that we are blocking in an async context. We'll work on getting a fix out for this soon.