feat: add context param to policy

[hperl]

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

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.56%. Comparing base (687d578) to head (9a9beaf).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
selfservice/strategy/oidc/strategy.go	66.66%	1 Missing ⚠️
selfservice/strategy/oidc/strategy_login.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4315   +/-   ##
=======================================
  Coverage   78.56%   78.56%           
=======================================
  Files         381      381           
  Lines       27454    27454           
=======================================
  Hits        21569    21569           
  Misses       4252     4252           
  Partials     1633     1633           

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