Add HttpHelper methods that accept options structs

[tonerdo]

This PR adds option classes for the HttpHelper methods so that it can be more easily extended in a backwards compatible way.

Addresses #902

[dkuzmenok]

@denis256
@tonerdo
https://github.com/gruntwork-io/terratest/blob/master/modules/http-helper/http_helper.go#L211
There was a []byte used to pass request body, then it was used to create a byte reader and pass to http.Request constructor.
When we require to use byte reader directly from HttpDoOptions, then on request retry we will try to use a reader that is already read in a previous request attempt.

I do see 2 options to stay safe:

1. Add additional field to HttpDoOptions to set BodyReader value, and Body to be able to use both a provided reader or the byte slice.
2. Change Body to become []byte and create Reader from it, like it is already done.

Personally I would prefer 1) as it gives flexibility.

[tonerdo]

@dkuzmenok the changes in this PR already account for the scenario you mentioned. If you take a look at

terratest/modules/http-helper/http_helper.go

Lines 352 to 357 in 0acf7fc

	data, err := io.ReadAll(options.Body)
	if err != nil {
	return "", err
	}
	options.Body = nil

we read the data out of the io.Reader and cache it for use in subsequent requests.

[dkuzmenok]

@tonerdo Strange I did not notice that, when I was tracing method calls. Then it looks fine. Thanks.

[dkuzmenok]

@denis256 @tonerdo Is there any timeline to merge this? There are no changes to existing method signatures, so should be safe.