support connection in stage related table functions

[youngsofun]

we did not support uri because it need connection

for now, user can work around by create a stage first.
since we now support used defined connenction, we can use INFER_SCHEMA(location ='<uri>', connection='<conn_name>'), it save user from creating a object for URIs that not need connection (http, fs)

Originally posted by @youngsofun in #13746 (comment)

[guojidan]

I want to solve it, please assign to me

[guojidan]

I have some confused, for stage we can relate connection when crate it, so we not need relate them in table function？
for http/ fs, stage not support it yet when create stage, so we need temporary convert location = <uri> to stage without add stage to meta?

[youngsofun]

I have some confused, for stage we can relate connection when crate it, so we not need relate them in table function？ for http/ fs, stage not support it yet when create stage, so we need temporary convert location = <uri> to stage without add stage to meta?

yes, we have kind of location

1. user stage or created stage from uri + [connection] (recommended for production)
2. used uri + [connection] directly.

you can refer to the code of copy into table