Use v1/bootstrap if Connect version supports it

[nealrichardson]

As this endpoint comes out of experimental, we should switch to the new endpoint depending on the version of the Connect server we're talking to.

[aronatkins]

The 2024.05.0 release includes POST /__api__/v1/bootstrap. The POST /__api__/v1/experimental/boostrap endpoint is deprecated and scheduled for removal with 2024.12.0.

rsconnect-python should start using the /v1/ API for Connect 2024.05.0 and newer, using the /v1/experimental/ API for older versions until they pass beyond the support horizon (18mos from 2024.04.0).

[aronatkins]

A challenge for this particular endpoint: the internal server_settings API is used to obtain the Connect version, but server version is not provided to unauthenticated requests.

[nealrichardson]

Hmm, then do we have to

try:
    POST /__api__/v1/bootstrap
except:
    POST /__api__/v1/experimental/bootstrap