Normalize Etag format

[wonwuakpa-msft]

Description

This fixes a bug with the Etag blob property where info() and ls() were returning different formats. This GitHub issue reproduces said bug. This is due to API differences when using BlobClient.get_blob_properties() vs BlobContainer.walk_blobs().
This PR introduces a standardization to _details() by ensuring the Etag property return type is wrapped with double quotes. S3fs formats Etags with double quotes here

Test

Added test_etag_normalized_form to test both calls property is equivalent and there is no double quoting

[nateprewitt]

Thanks for the PR, @wonwuakpa-msft, this is a great start! I left some initial feedback on a few things. Please let me know if you think I'm missing something or if you have any questions.

[nateprewitt]

@wonwuakpa-msft It looks like the latest commit may have modified the newline at the end of spec.py so it's diffing the entire file. Can you take a look at that? Feel free to ping me if you need help.

[wonwuakpa-msft]

@wonwuakpa-msft It looks like the latest commit may have modified the newline at the end of spec.py so it's diffing the entire file. Can you take a look at that? Feel free to ping me if you need help.

Yes, it was changing the line endings of every line in spec.py from LF to CRLF, so git detected that as a new change. Setting the git config core.autocrlf = input and changing my settings.json file in VSCode to /n resolved it.