[FEATURE] Support lifecycle field on applications

[jameshochadel]

What area do you want to see improved?

terraform provider

Is your feature request related to a problem? Please describe.

Cloud Foundry recently added support for Cloud Native Buildpacks (CNBs). You configure an app to use a CNB by specifying lifecycle: cnb on the application manifest and referencing a CNB in the buildpacks field.

The provider does not yet support the lifecycle field.

Describe the solution you would like

I propose adding support for the lifecycle field so users can deploy apps with CNBs using the provider.

Describe alternatives you have considered

No response

Additional context

No response

[github-actions]

Thanks for the feature request. We evaluate it and update the issue accordingly.

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[lechnerc77]

This feature is partially implemented in #287 .
However, the cnb lifecycle is still in experimental state (https://v3-apidocs.cloudfoundry.org/version/3.204.0/#cloud-native-buildpacks-lifecycle-experimental). The current plan is to support it once GA

[jameshochadel]

Ah, got it, thanks @lechnerc77.

Edit: @lechnerc77 I was thinking about this some more, and I was wondering if you'd consider a separate way to support experimental fields? For instance, a new experimental block that might introduce breaking changes, or a freeform additional_fields object that gets merged into the manifest alongside the predefined fields.

The motivating use case is: I have a few projects that deploy with this provider, and which also would like to experiment with CNBs. If the provider isn't adding top-level support for lifecycle, we'd have to deploy those using a manifest instead in order to experiment. I'd love to keep using the provider if possible.

[lechnerc77]

Feature is still in experimental state -> clarification with CF org if there is a tiemline for GA