[k6] More tests for vai and UI testing

[MSpencer87]

No description provided.

[git-ival]

Looks good but I have some thoughts mostly around the code structure. I think we should try and make the functions in the utils as generic as possible.

To that end, maybe we have the metadata and data be separate parameters to our util functions for API requests like these (see the secrets-oriented functions for example). That way you can pass in any valid metadata + data and have it work™️. I think we would also want to default to the currently hardcoded defaults if they are not passed in*

[git-ival]

Nitpick: can we rename the functions in generic_utils.js to use the singular tense (since they don't create multiple secrets)?

It would also be good to return the res object in case future tests might benefit from having access to the full response data.

[git-ival]

LGTM 🚀