feat: add polling the pull request for the validation

[Skarlso]

• Add Unit Tests to the validation controller.

[Skarlso]

[Skarlso]

Before merge:

➜  mpas-public-demo git:(add-validation-flow) k get gitrepository -A
NAMESPACE               NAME                                      URL                                                                 AGE     READY   STATUS
flux-system             flux-system                               https://gitea.ocm.dev/software-consumer/mpas-ocm-applications.git   10m     True    stored artifact for revision 'main@sha1:73e7d96e78874c930a4e285d9dd2fc40e3c85ec3'
mpas-ocm-applications   podinfo-validation-bfdd017a-values-repo   https://gitea.ocm.dev/software-consumer/mpas-ocm-applications       2m57s   True    stored artifact for revision 'refs/pull/4/head@sha1:c4d43b6eda8c2a54a9e9326eda9ca6614dfe45b4'
mpas-system             mpas-ocm-applications                     https://gitea.ocm.dev/software-consumer/mpas-ocm-applications       7m31s   True    stored artifact for revision 'main@sha1:73e7d96e78874c930a4e285d9dd2fc40e3c85ec3'

After merge:

➜  mpas-public-demo git:(add-validation-flow) k get gitrepository -A
NAMESPACE     NAME                    URL                                                                 AGE     READY   STATUS
flux-system   flux-system             https://gitea.ocm.dev/software-consumer/mpas-ocm-applications.git   10m     True    stored artifact for revision 'main@sha1:73e7d96e78874c930a4e285d9dd2fc40e3c85ec3'
mpas-system   mpas-ocm-applications   https://gitea.ocm.dev/software-consumer/mpas-ocm-applications       7m56s   True    stored artifact for revision 'main@sha1:73e7d96e78874c930a4e285d9dd2fc40e3c85ec3'