fix: csrf token regenerate on browser flows

[aeneasr]

Closes #3705

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
  confirm that I got the approval (please contact
  [email protected]) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (688111c) 78.31% compared to head (a36f095) 78.35%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3706      +/-   ##
==========================================
+ Coverage   78.31%   78.35%   +0.03%     
==========================================
  Files         346      346              
  Lines       23570    23571       +1     
==========================================
+ Hits        18459    18468       +9     
+ Misses       3717     3710       -7     
+ Partials     1394     1393       -1     

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