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

**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