KFP-Tekton v1.6.6: Tekton 0.44.2 support, bug patch on scheduled workflow and sdk release

• Support Openshift pipelines v1.10
• Scheduled workflow now can store Tekton metadata
• Bug patch and performance enhancement.

What's Changed

• feat(manifest): Add openshift pipelines kustomize integration by @Tomcli in #1220
• fix(backend): add license files by @yhwang in #1222
• feat(backend): Add metadata field to scheduled workflow by @Tomcli in #1221
• fix(backend): Fix global cache flag by @Tomcli in #1224
• fix(manifests): fix unsaved kustomization.yaml for openshift pipelines by @Tomcli in #1229
• feat(manifests): opt-out sidecar injection feature flag to increase performance by @Tomcli in #1230
• fix(sdk): Update kfp version to fix appengine bug by @Tomcli in #1235
• fix(sdk): Update wait_for_run_completion function to handle tekton status; by @Tomcli in #1234
• chore(release): Add 1.6.6-backend release by @Tomcli in #1236
• fix(manifests): Update manifests to make it work on both k8s and openshift by @Tomcli in #1239

Full Changelog: v1.6.5...v1.6.6