* feat: support labels key in transformer configuration
Allow the usage of a separate transformer configuration for the labels key,
similar to what is currently available for commonLabels and commonAnnotations.
This aims to provide the same functionality that commonLabels currently provide
for labels, since commonLabels is deprecated and slated for removal in a future
release.
* chore(transformerconfig): add nolint hint
Add a nolint hint to the new method so the returns can stay consistent with
one another.
* fix: changes from code review
* Rename methods `AddCommonLabelFieldSpec` and `AddLabelFieldSpec` to
`AddCommonLabelsFieldSpec` and `AddLabelsFieldSpec`.
* Add extra test to verify scenarios applying labels to Custom Resource Definitions.
* add origin annotation for resources generated by builtin and custom generators
* decouple origin data from generator data and account for inline generators
* Refactor prefix filter into its own filter, decoupled from the prefixsuffix filter
* Refactor prefix transformer into its own transformer, decoupled from the prefixsuffix transformer
* Refactor suffix filter into its own filter, decoupled from the prefixsuffix filter
* Refactor suffix transformer into its own transformer, decoupled from the prefixsuffix transformer
* Add a default nameSuffix field spec in addition to the namePrefix
* Remove the PrefixSuffixTransformer from the list of builtin transformers
* Add a multi-transformer to builtinhelpers.TransformFactories
* Remove the implementation of the prefixsuffixtransformer.PrefixSuffixTransformer
* Resolve style and format related feedback from the pull request
* Add test to test the legacy PrefixSuffixTransformer for BC purposes
