Refactor the Tekton pipelines and PipelineRuns under the .tekton/ directories for Hub, Operator, and operator-bundle to support multi-architecture builds using the docker-build-multi-platform-oci-ta pipeline, updating component annotations accordingly and ensuring the workflow can easily be extended to future architectures in case that would be in need.

add multi-arch support for tekton pipelines

for multiarch pipeline name is:

docker-build-multi-platform-oci-ta

so when you creating component set annotation to it :

metadata:
  annotations:
    build.appstudio.openshift.io/pipeline: '{"name":"docker-build-multi-platform-oci-ta","bundle":"latest"}'