[data grid] Add default reset value in row edit mode

[michelengelen]

• [x] I have followed (at least) the PR section of the contributing guide.

This adds the same default value resets as in #12216 and changes the test structure a bit to call the same tests for different scenarios.

Fixes #13628

[mui-bot]

Deploy preview: https://deploy-preview-14050--material-ui-x.netlify.app/

Generated by :no_entry_sign: dangerJS against e104b28ae24cc9b1cd1248ef5c0656f62fd69a28