clear default manifest name if product flag used with sync

[amartin120]

Please check below, if the PR fulfills these requirements:

• Commit(s) and code follow the repositories guidelines.
• Test(s) have been added or updated to support these change(s).
• Doc(s) have been added or updated to support these change(s).

Associated Links:

Types of Changes:

• Bugfix

Proposed Changes:

• If --products is used on the sync command, clear the default manifest filename. Otherwise hauler will process the --products flag and then attempt to process the "default" filename.

• This approach ensures:
  ✅ --filename isn't forced when using --products.
  ✅ Users can still use both flags together if they explicitly provide --filename.
  ✅ If no flags are passed, filename retains its default value.

Verification/Testing of Changes:

• Before:
  

• After:
  

Additional Context: