Add paved.GetFloat() function

[rickard-von-essen]

This adds paved.GetFloat() function similar to paved.GetString() and paved.GetInteger() but returning a float64.

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[negz]

Thanks! Can you provide some context around what you need this for?

I vaguely recall that we actually used to have something like this but intentionally dropped it, because you're not supposed to use floats in Kubernetes APIs. From https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#primitive-types:

Avoid floating-point values as much as possible, and never use them in spec. Floating-point values cannot be reliably round-tripped (encoded and re-decoded) without changing, and have varying precision and representations across languages and architectures.

[rickard-von-essen]

Sorry I should have provided some context.

I needed this in this PR provider-upjet-gcp#623 to read the port (as in IPv4 port).

I first assumed it was a integer since inherently a port is an int and the Terraform schema mark it as schema.TypeInt. But after some debugging I realize it was passed as a json number which translates into a float.

[negz]

@rickard-von-essen I'm pretty confident this is a bug in upjet - these fields should not be floats in the Go structs. That violates the Kubernetes API conventions I linked above. It also doesn't make sense in most of the cases - ports, replica counts, etc presumably can never actually be a floating point number.

So, I suggest we fix the bug (which I assume is in upjet) rather than adding a GetFloat utility here.

[rickard-von-essen]

@negz Thanks for your insight on this. I'll close this and see if I have some time to chase down the issue in upjet.