Add Task definition without PipelineResource

[vdemeester]

In the recent PipelineResource working group and as presented during Oct. 2 working group, and related to tektoncd/pipeline#1369 :

In the most recent PipelineResource working group we landed on the idea of keeping PipelineResources as Alpha when the rest of the Tekton resources move to Beta. So with that approach we'll need to make sure that our docs correctly reflect the "right" way to work with external resources.

In this direction, we may want to provide Task definition in the catalog that do not depend on PipelineResource, alongside ones that do. This issue is here to track work related to that.

We could have yaml files alongside the one that have PipelineResource:

~/s/g/t/catalog ± master:328b678 λ ls -l golang 
.rw-rw-r--@ 1.3k vincent 24 Sep 17:26 build.yaml
.rw-rw-r--@ 1.3k vincent 24 Sep 17:26 build.pr.yaml
.rw-rw-r--@ 1.2k vincent 24 Sep 17:26 lint.yaml
.rw-rw-r--@ 1.2k vincent 24 Sep 17:26 lint.pr.yaml
.rw-rw-r--@ 3.7k vincent 11 Sep 13:21 README.md
.rw-rw-r--@ 1.3k vincent 24 Sep 17:26 tests.yaml
.rw-rw-r--@ 1.3k vincent 24 Sep 17:26 tests.pr.yaml

[tekton-robot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.
If this issue is safe to close now please do so with /close.

/lifecycle rotten

Send feedback to tektoncd/plumbing.

[vdemeester]

/close

[tekton-robot]

@vdemeester: Closing this issue.

In response to this:

/close

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.