Optimize the number of auth requests for oras manifest delete and oras blob delete

[qweeah]

What is the version of your ORAS CLI

v1.1.0-rc.2

What would you like to be added?

Like #1084, when deleting a manifest, the request 4 and 5 can be avoided if we get a token with delete scope in request 1:

request #0: HEAD manifest tag- 401
request #1: GET token (scope: pull) - 200
request #2: HEAD manifest tag- 200
request #3: GET manifest digest- 200
request #4: DELETE manifest digest 401
request #5: GET token (scope: delete, pull) - 200
request #6: DELETE manifest digest - 202

Same for oras blob delete

Why is this needed for ORAS?

This can further improve the performance of ORAS.

Are you willing to submit PRs to contribute to this feature?

• Yes, I am willing to implement it.