Option NOT To Sign The APK Even If Debug Keystore Is Present

[MikuAuahDark]

Is your feature request related to a problem? Please describe.
I'd like to generate unsigned APK using build-apks command.

Describe the solution you'd like
A flag switch --no-sign that won't sign the APK even if debug keystore is present. Of course this is mutually exclusive with --ks option.

Describe alternatives you've considered
My current workaround is to rename debug.keystore to something else before running bundletool and rename it to their original name afterwards.

Additional context
I'd like to distribute unsigned APK. The APKs are meant to be modified further by end-users and signed by themselves.