Add "constructor" linter

[leonklingele]

Your feature request related to a problem? Please describe.

The constructor linter reports whether name of a constructor like function does not begin "New":

type T1 struct{}

func NewT1() (t *T1) { return } // OK

func CreateT1() (t *T1) { return } // want `name of a constructor like function must begin "New"`

https://github.com/gostaticanalysis/constructor

Describe the solution you'd like.

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Describe alternatives you've considered.

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Additional context.

No response