Allow disabling the addition of imported CRDs in Helm output

[bderrly]

Description of the feature or enhancement:

Disable the output of CRDs when using Helm synthesis.

Use Case:

I already have the CRDs installed on the cluster with separate Helm charts and do not want the output from cdk8s to be competing with that Helm chart.

Proposed Solution:

A --no-crds (or similar) flag on cdk8s synth --format helm.

• [x] :wave: I may be able to implement this feature request
• [ ] :warning: This feature might incur a breaking change

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This is a :rocket: Feature Request

[iliapolo]

@bderrly Sounds like a nice enhancement. PR's are welcome :)