fix(sdk): improve discriminators for node and Go

[aeneasr]

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
  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

[hperl]

Nice! This will fix things!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.01%. Comparing base (a6ad983) to head (2391e9c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3821   +/-   ##
=======================================
  Coverage   78.01%   78.01%           
=======================================
  Files         358      358           
  Lines       25165    25165           
=======================================
  Hits        19633    19633           
  Misses       4026     4026           
  Partials     1506     1506           

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