fix: backport fix for client specific CORS (#1754)

[har07]

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

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #3163 (513092a) into master (ed6eb30) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 513092a differs from pull request most recent head f7c0b01. Consider uploading reports for the commit f7c0b01 to get more accurate results

@@            Coverage Diff             @@
##           master    #3163      +/-   ##
==========================================
- Coverage   79.55%   79.53%   -0.02%     
==========================================
  Files         112      112              
  Lines        7971     7973       +2     
==========================================
  Hits         6341     6341              
- Misses       1225     1226       +1     
- Partials      405      406       +1     

Impacted Files	Coverage Δ
x/oauth2cors/cors.go	89.47% <100.00%> (+0.38%)	⬆️
persistence/sql/persister_oauth2.go	81.01% <0.00%> (-0.85%)	⬇️

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[aeneasr]

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