[chore] Update azcore and azidentity

[thomas11]

The releases and changelogs:

• https://github.com/Azure/azure-sdk-for-go/releases/tag/sdk%2Fazidentity%2Fv1.8.1 - contains potentially relevant bug fixes
• https://github.com/Azure/azure-sdk-for-go/releases/tag/sdk%2Fazcore%2Fv1.17.0

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.38%. Comparing base (2b1810d) to head (7cb318b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3886   +/-   ##
=======================================
  Coverage   57.37%   57.38%           
=======================================
  Files          79       79           
  Lines       12456    12456           
=======================================
+ Hits         7147     7148    +1     
+ Misses       4766     4765    -1     
  Partials      543      543           

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[pulumi-bot]

This PR has been shipped in release v2.85.0.