Add support for Schematics

[l2fprod]

It would be useful to have tasks to drive a schematics workspace (new/plan/apply/destroy/output support)

I found some in https://github.com/open-toolchain/schematics-toolchain/tree/master/.tekton but moving them to the catalog would be a better option

[jauninb]

@DavidLopezIBM @triceam

[triceam]

There are tekton definitions in:
https://github.com/open-toolchain/schematics-toolchain/tree/master/.tekton

I have no objection to them being added to the shared catalog.

[l2fprod]

Trying the task https://github.com/open-toolchain/schematics-toolchain/blob/master/.tekton/task-workspace-update.yaml, the update reading from environment variables is not ideal. I'd rather want to provide the JSON file to use or be able to pass the values as parameters to the task, so it will be more explicit

[triceam]

That was based on the requirements for integration with schematics. It could be easily changed. Schematics is also introducing a new concept of environment configurations which should be better suited than env vars or json. (Their env configs are supposed to also be able to live in git repos, so there will be a revision-controlled configuration that can be a peer repo to the terraform template.

[jauninb]

https://github.ibm.com/org-ids/roadmap/issues/18121