SNOW-1752069: generate-jwt should use settings from config.toml

[sfc-gh-vtimofeenko]

Description

Currently generate_jwt command has its own set of flags and does not seem to take config.toml into account at all.

For example:

snow connection generate-jwt --private-key <p8-file-path>                             
Enter private key file password (Press enter if none) []: 

An unexpected exception occurred. Use --debug option to see the traceback. Exception message:

argument of type 'NoneType' is not iterable

The error

argument of type 'NoneType' is not iterable
Probably happens because of the type here:

def generate_jwt(
    account: str = typer.Option(
        None,
        "--account",
        "-a",
        "--accountname",
        help="Account name to use when authenticating with Snowflake.",
        show_default=False,
    ),

This also applies to the user and private_key_file values.

• Other commands use values from the configuration file
• argument of type 'NoneType' is not iterable is not immediately apparent on how to fix. --debug does show the location, but the error message could be better

Context

No response