Feature/add client metadata

[pike1212]

Related issue

#1594

Proposed changes

Adds metadata field to oauth client

Checklist

• I have read the contributing 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 necessary documentation within the code base (if appropriate)
• I have documented my changes in the developer guide (if appropriate)

Further comments

[CLAassistant]

All committers have signed the CLA.

[pike1212]

make test works for me locally, I did run make sdk and commit those changes, but not sure why these tests are failing

[aeneasr]

Thank you! This already looks really good. Tests fail because you added another CREATE TABLE test to cockroachdb, but an alter table is required - see my comments on the code. :)

[aeneasr]

This requires an ALTER statement, not another CREATE TABLE as it won't have any effect

[pike1212]

A little unsure what needs done here, I added the 13.sql back and added a 14.sql with an alter statement, but I think the tests are still failing

[aeneasr]

Please run make sqlbin, then tests should pass.

[aeneasr]

Thank you for your contribution!