fix oauth2 folder fetch

[jackkav]

fix #7596

motivation: the oauth2 dialog in the folder allows you to fetch with the given config in order to test it, but it will also generate a token object. However in a folder this code path wasn't working because it was only written for requests not folders.

Approaches:

• remove the token fetcher from the folder dialog
• fix the token fetcher in folders

future work:

• add a ux to indicate tokens exist as child objects of requests and groups
• point the request at the folder token rather than regenerating a token in the request by overwriting the request auth object.

[sentry]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ Error: failed to find request invariant(src/utils/invariant) View Issue

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