Fix: Pass auth headers in 2FA and recovery redirects

[LiwaaCoder]

Summary: In two_factor_and_totp_validate and recovery_code, the headers returned by _login_user (which contain the new session/auth cookies) were being ignored. This caused the session to be invalidated immediately after the HTTP 303 redirect.

Fix: captured the headers from _login_user and passed them to HTTPSeeOther.

Related Issue: "Fixes #19222"

[LiwaaCoder]

Transltion ready

[chigwell]

@LiwaaCoder Could you please lint ./warehouse/accounts/views.py using:

python -m flake8 .

to fix the failed pipeline: https://github.com/pypi/warehouse/actions/runs/20603008465/job/59214735297?pr=19223#step:5:13

[cofiem]

@LiwaaCoder Could you please lint ./warehouse/accounts/views.py using:

python -m flake8 .

to fix the failed pipeline: https://github.com/pypi/warehouse/actions/runs/20603008465/job/59214735297?pr=19223#step:5:13

Use make reformat to format code. See: https://warehouse.pypa.io/development/submitting-patches/#code

[LiwaaCoder]

Thanks for the guidance! I ran the formatters locally and pushed the fixes. The linting errors should be resolved now.
@chigwell @cofiem

[di]

This is not the cause of #19222 and will have no effect, see #19261.