Add optional output path parameter to sign and asign methods

[hstct]

This commit introduces an optional output_path parameter to the sign and asign methods, allowing signed content to be stored in a specified location. This helps with better handling and cleanup of temporary files.

closes #5923

[hstct]

For more context the related pulp_deb PR: pulp/pulp_deb#1142

[mdellweg]

I am not particularly happy with this. Preferably the script should run in the working directory of the task that should be a subdirectory of settings.WORKING_DIRECTORY.
If that's not an option, passing the output dir as an environment variable is probably less disruptive to existing signing scripts.

Somehow this reminds me of #5913.

[hstct]

For more context the related pulp_deb PR: pulp/pulp_deb#1142

I am not particularly happy with this. Preferably the script should run in the working directory of the task that should be a subdirectory of settings.WORKING_DIRECTORY. If that's not an option, passing the output dir as an environment variable is probably less disruptive to existing signing scripts.

Somehow this reminds me of #5913.

Oh, you are right I'm able to achieve the same thing with the env variables but without making a change in pulpcore! This sounds preferable to me, so I will close this PR and issue. Thanks!