Curl_timeleft: check both timeouts during connect

Curl_timeleft: check both timeouts during connect

The duration of a connect and the total transfer are calculated from two
different time-stamps. It can end up with the total timeout triggering
before the connect timeout expires and we should make sure to
acknowledge whichever timeout that is reached first.

This is especially notable when a transfer first sits in PENDING, as
that time is counted in the total time but the connect timeout is based
on the time since the handle changed to the CONNECT state.

The CONNECTTIMEOUT is per connect attempt. The TIMEOUT is for the entire
operation.

Fixes #6744
Closes #6745
Reported-by: Andrei Bica
Assisted-by: Jay Satiro