Deprecate and remove the flag for the packages directory for creating new services

[edaena]

As a:
Developer

I want:
To remove the packages directory flag in the bedrock service install-build-pipeline

So that:
This redundant workflow is deprecated.

Describe the solution you'd like:

Acceptance Criteria:

Describe alternatives you've considered:

Additional context:
Related to #1405

Does this require updates to documentation?:
Yes