Resolve "Update CI yaml reference"

What this MR does / why we need it:

Updates the gitlab CI yml file to reference for pipelines. Before, each downstream OSP had its own yml file in the opencpi project; now all downstream OSPs use the same file.

Steps to complete before submitting MR:

• I have read Contribution guidelines

Release Notes

N/A

Changelog

N/A

Which issue(s) this MR closes

Closes #45 (closed)