Reapply "remove tekton results migrator"

[enarha]

This reverts commit dfb5828501e9ec7b2027d37db4e16f8748091bd8.

This reintroduces the "remove tekton results migrator" change. Since it's dependant on the migrator confuguration in the results fork now removed, readding the change in pipeline service, broke the main branch. This will fix the main branch.

This takes the ref to the results fork one commit further (a602fb3e858f6a3195374d2175053db7e5db9f77) than the commit used in prod (1c5b3054ffb52f172fda31587d7dfd88a9724c8f), but it's a change that does not affect the Results service.

[enarha]

I was able to verify the fix manually (deploy + running the test.sh).

[ramessesii2]

tests are failing, for ref:-

test-pipeline-service-upgrade-ocp-414

Failure snippet:
task test-downgrade has the status "Failed":

from server for: "/workspace/source/operator/test/manifests/setup/pipeline-service": rolebindings.rbac.authorization.k8s.io "appstudio-pipelines-runner-rolebinding" is forbidden: User "system:serviceaccount:default:default" cannot get resource "rolebindings" in API group "rbac.authorization.k8s.io" in the namespace "plnsvc-tests"
command terminated with exit code 1
+ exit 1

test-pipeline-service-deployment-ocp-414
Failure snippet:
task test-pipeline-service has the status "Failed":

ensure CRDs are installed first
command terminated with exit code 1
+ exit 1

[ramessesii2]

/test test-pipeline-service-upgrade-ocp-414 /test test-pipeline-service-deployment-ocp-414

[ramessesii2]

/test test-pipeline-service-deployment-ocp-414

[ramessesii2]

ohh I just saw your comment Emil that the tests are expected to fail.

[avinal]

Yeah I was just going to point out that.