Tilt: allowing duplicated resources for addons/providers

[prometherion]

What would you like to be added (User Story)?

As a CAPI provider developer I want to offer end-users a way to install multiple components by using the clusterctl file, such as:

• the ControlPlane provider components
• the concrete implementation

These components are expected to be deployed in the same Namespace for logical grouping.

Detailed Description

With the said example, the two components are expected to be deployed in the same Namespace.

However, the Tiltfile used by clusterctl doesn't allow duplicates since allow_duplicates default value is false:

cluster-api/Tiltfile

Line 371 in 3b55934

k8s_yaml(yaml)

Anything else you would like to add?

A similar use case is the following one: #6079 (comment)

Label(s) to be applied

/kind feature
/area clusterctl

[k8s-ci-robot]

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[sbueringer]

Is the problem basically that in this case the Namespace object is duplicate?

In general if the only thing we have to do is to set allow_duplicates = True in l.371 I'm fine with making the change

[prometherion]

Thanks, Stefan! I'm going to open the PR!