Allow Kptfile pipeline functions to reference config by resource name

[ChristopherFry]

Requesting kpt is updated to allow Kptfile pipeline functions to reference configs by resource name. Today, the Kptfile Function spec allows configs to be either inline or referenced by config path.

Advantages of this includes allowing kpt to process a stream of resources and would also eliminate an issue where functions do not support references to multi resource yaml files.

[mansoor17syed]

Hi Team, Can you Please assign this ticket to me I wish to contribute here

[mikebz]

done, thank you!

[mansoor17syed]

Hi Team,

I've made the changes and raised a MR. As I'm new to this, I'm not sure how well I've done. I'd appreciate your feedback and guidance on how to proceed.

Thanks!

[mansoor17syed]

Hi @mikebz @yuwenma @mortent

Can you Please help me review this and share your feedback