Help message for migrate sql is unclear regarding source of database URL.

[dkushner]

Describe the bug
When invoking the hydra sql migrate command, the help message indicates that the database URL must either be specified as a command line argument (i.e. hydra sql migrate <DATABASE_URL>) or sourced from the environment variable DSN if the user specifies the -e flag.

In reality, if the user specifies the -e flag, it will also (only?) pull the database URL from the config file provided via the --config flag.

To Reproduce
Steps to reproduce the behavior:

1. Run hydra sql migrate --config test.yaml where the test configuration file specifies a database URL under the dsn key.
2. Observe that the command is not executed and instead a usage message is output in the terminal.

Expected behavior
The command would read the target database URL from the indicated config file.

Version:

• Environment: Kubernetes
• Version v1.0.0-rc10

[aeneasr]

This is now resolved as discussed per discord and #1412