fix(oidc): Match the proper error type for invalid refresh token

[zecakeh]

This was forgotten in #4761. Since we do not use mas-oidc-client anymore, the error to match has changed.

The second commit adds tests that would have catched the regression.

[codecov]

Codecov Report

Attention: Patch coverage is 78.12500% with 7 lines in your changes missing coverage. Please review.

Project coverage is 86.36%. Comparing base (daad6d6) to head (82aaeb8).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/matrix-sdk/src/test_utils/mocks/mod.rs	76.47%	4 Missing ⚠️
crates/matrix-sdk/src/client/futures.rs	60.00%	2 Missing ⚠️
crates/matrix-sdk/src/test_utils/mocks/oauth.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4767      +/-   ##
==========================================
+ Coverage   86.29%   86.36%   +0.07%     
==========================================
  Files         291      291              
  Lines       34291    34306      +15     
==========================================
+ Hits        29590    29627      +37     
+ Misses       4701     4679      -22     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[poljar]

I left a couple of suggestions for the tests. Thanks for catching and fixing this so quickly.