[BUG][Go] respect initialisms or acronyms in names

Created by: jirikuncar

Description

Names in generated Go clients do not respect recommended style.

Url -> URL
Id -> ID
Http -> HTTP

openapi-generator version

all

Related issues/PRs

https://github.com/golang/go/wiki/CodeReviewComments#initialisms

Suggest a fix

Override GoExperimentalCodegen.toParamName method.