identity/oidc: adds detailed listing capability for clients and providers

[austingebauer]

This PR adds detailed listing capability for OIDC clients and providers by introducing the detailed query parameter. The motivation for this is to improve the user experience in the Vault UI.

Example of detailed client list:

$ vault list -detailed identity/oidc/client

Keys      access_token_ttl    assignments    client_id                           client_type     id_token_ttl    key        redirect_uris
----      ----------------    -----------    ---------                           -----------     ------------    ---        -------------
my-app    24h                 [allow_all]    wGr981oYLJbcr4zrUriYxjxSc80JL7HW    confidential    24h             default    [http://localhost:5555/callback]

Example of detailed provider list:

$ vault list -detailed identity/oidc/provider

Keys       allowed_client_ids    issuer                                                     scopes_supported
----       ------------------    ------                                                     ----------------
default    [*]                   http://127.0.0.1:8200/v1/identity/oidc/provider/default    []

[vinay-gopalan]

LGTM! Looks like we're missing a changelog?

[calvn]

Does it support the vault list ... subcommand, and if so what does the output look like?

[austingebauer]

@calvn - Good question, I thought it might be okay for this to not work with the vault list command, but I'm now seeing ListResponseWithInfo. I think using ListResponseWithInfo is a better option, so I'll go with that. That'll remove the need for the query parameter and allow users to execute vault list ... and vault list -detailed ....

[austingebauer]

The CLI formats the list with -detailed into a table. I like this better. Changing the approach here.

$ vault list identity/oidc/provider
Keys
----
default

$ vault list -detailed identity/oidc/provider

Keys       allowed_client_ids    issuer                                                     scopes_supported
----       ------------------    ------                                                     ----------------
default    [*]                   http://127.0.0.1:8200/v1/identity/oidc/provider/default    []

[austingebauer]

Changed approach to use ListResponseWithInfo in 763b0f3.