convert fullstack ghprb PR test job to prow job
This commit:
- Configures both the PR and the periodic fullstack jobs to use the
dynamic pipeline script.
- Adds Prow specific parameters for both the PR and periodic fullstack
test jjbs.
- Removes the IPA_REF parameter from both the PR and the periodic fullstack
jobs as that parameter will have no role in the future in the IPA building.
Notes:
- The PR fullstack test is planned to be triggered by Prow.
Signed-off-by: Adam Rozman <adam.rozman@est.tech>
Change-Id: I322a9442ea5e5beb861cc94ea200f36548dfad9b