docs: `--use-docker` and `--no-docker` options of `cfn submit` are missing from the documentation

[cv-dote]

Summary

The --use-docker and --no-docker options were added to cfn submit in #970 (merged on May 4, 2023), but the documentation was not updated in the same change. As a result:

• doc_source/resource-type-cli-submit.md in this repository does not mention either option.
• The public AWS documentation page (which is generated from doc_source/) also does not mention them.

Users can discover these options only by running cfn submit --help or by reading the source code.

Current state

In src/rpdk/core/submit.py, the options are registered like this:

nodocker_group = parser.add_mutually_exclusive_group()
nodocker_group.add_argument(
    "--use-docker",
    action="store_true",
    help="""Use docker for platform-independent packaging.
        This is highly recommended unless you are experienced
        with cross-platform packaging.""",
)
nodocker_group.add_argument(
    "--no-docker",
    action="store_true",
    help="""Generally not recommended unless you are experienced
        with cross-platform packaging.""",
)

But doc_source/resource-type-cli-submit.md lists only:

[--dry-run]
[--endpoint-url <value>]
[--profile <value>]
[--region <value>]
[--role-arn <value>]
[--no-role]
[--set-default]

Proposed fix

Update doc_source/resource-type-cli-submit.md to:

1. Add [--use-docker] and [--no-docker] to the Synopsis block.
2. Add an entry for each option under the Options section, describing:
   • What the option does.
   • That --use-docker and --no-docker are mutually exclusive.
   • That these flags override the use_docker / no_docker setting in .rpdk-config.

Additional context

I'd like to pick this up and send a PR if that's okay.