Enhance ReplacementTranformer to Allow Replacing into Multiple Targets

[lb4368]

Problem description
There are use cases where we need to ReplacementTransform the same source data into multiple target paths – e.g. replacing an IP address into many network policy rules. It would be helpful for the RT to support this natively.

Proposed change
Enhance the ReplacementTransformer KRM function to support specifying multiple targets so that a single source can be replaced into multiple targets.

Improve Transformer to support Target as Slice :

airshipctl/pkg/document/plugin/replacement/transformer.go

Line 77 in 7998615

if err := replace(items, r.Target, val); err != nil {

[sirajyasin]

I can start working on this issue if no one has started yet. @lb4368 can you please assign this issue to me

[lb4368]

@sirajyasin Done. Thanks!

[aodinokov]

https://review.opendev.org/c/airship/airshipctl/+/788405 - merged, can be closed

[eak13]

Closing per code merge above.