PYTHON-3909 Fix OIDC reauth for bulk write operations

[ShaneHarvey]

https://jira.mongodb.org/browse/PYTHON-3909

[blink1073]

Hmm, I see export DB_USER=, but it is failing to use the username in the default context.

[blink1073]

I pushed a fix.

[ShaneHarvey]

@blink1073 what's the purpose of AUTH_MECH? I'm wondering if we can just remove it altogether.

[blink1073]

Yeah, I agree we shouldn't need AUTH_MECH. I'll need to make a PR to drivers-evergreen-tools to not use SCRAM-256 on the OIDC host.

[ShaneHarvey]

Yeah, I agree we shouldn't need AUTH_MECH. I'll need to make a PR to drivers-evergreen-tools to not use SCRAM-256 on the OIDC host.

I don't think that's needed. The test client should automatically use SCRAM-SHA-256 by default.

[ShaneHarvey]

Tests are passing besides some broken core doc links:

(api/pymongo/collection: line    1) broken    http://mongodb.com/docs/manual/core/2dsphere/ - 404 Client Error: Not Found for url: https://www.mongodb.com/docs/manual/core/2dsphere/
(api/pymongo/collection: line    1) broken    http://mongodb.com/docs/manual/core/2d/ - 404 Client Error: Not Found for url: https://www.mongodb.com/docs/manual/core/2d/
(api/pymongo/collection: line    1) broken    http://mongodb.com/docs/manual/core/index-hashed/ - 404 Client Error: Not Found for url: https://www.mongodb.com/docs/manual/core/index-hashed/
(api/pymongo/collection: line    1) broken    http://mongodb.com/docs/manual/core/index-text/ - 404 Client Error: Not Found for url: https://www.mongodb.com/docs/manual/core/index-text/

[blink1073]

LGTM!