fix: client specific CORS

[aeneasr]

Closes #1754

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 green light (please contact security@ory.sh) 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

❗ No coverage uploaded for pull request base (v2.x@4e7ddf0). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             v2.x    #3159   +/-   ##
=======================================
  Coverage        ?   78.02%           
=======================================
  Files           ?      114           
  Lines           ?     8493           
  Branches        ?        0           
=======================================
  Hits            ?     6627           
  Misses          ?     1487           
  Partials        ?      379           

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