Fix(sqlmesh_dbt): Allow global options to be specified in both top-level and subcommand positions

[erindru]

the dbt cli allows a certain set of "global" options to be defined both at top level (before a subcommand) and at the subcommand level.

This means that the following are equivalent and valid:

$ dbt --profile jaffle_shop list
$ dbt list --profile jaffle_shop

This PR refactors how options are captured by the sqlmesh_dbt CLI to ensure that sqlmesh_dbt supports this too

[erindru]

One of the tests for --debug was failing because faulthandler.enable() raises an Exception if sys.stderr.fileno() fails.

sys.stderr.fileno() can fail if something, for example the Click TestRunner (or even pytest) has messed with sys.stderr and it's no longer a file.

So rather than bomb out, I changed this to just log a warning