PipelineConf provided with timeouts does not generate timeouts block in PipelineRun

[n-stout]

/kind bug

What steps did you take and what happened:
Create a PipelineConf object with set_timeout(NNN) applied
Supply pipeline_conf via kfp_tekton.compiler.TektonCompiler().compile(... ,pipeline_conf=XXX) and note in YAML it does not apply timeouts set from passed configuration

What did you expect to happen:
Timeouts to be honored and a timeouts: section generated in the YAML

Environment:

• Python Version (use python --version): 3.9.7
• SDK Version: 1.4.0
• Tekton Version (use tkn version): n/a
• Kubernetes Version (use kubectl version): n/a
• OS (e.g. from /etc/os-release): Debian GNU/Linux 11 (bullseye)

[Tomcli]

in kfp-tekton we are using the dsl.get_pipeline_conf().set_timeout(1) syntax, but since kfp supports the pipeline_conf object as well, I can add a PR to also add that support