Add capability to set timeout for ec2metadata's http client

[pyaesone17]

Currently if we use custom http client, it will take quite a long time for ec2metadata timeout ##2972. We could not able to use workaround for increasing hop as there is infra limit :) for that issue.
This PR will allow us flexibility to have custom http client and custom timeout for ec2metadata at the same time.

Using custom http client is important for us to make high throughput and low latency for our services. https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/custom-http.html

[mimol91]

@pyaesone17
You can pass own RoundTrip where you can adjust timeout. (In this way it just fail quickly)

const imdsv2Path = "/latest/api/token"

type disableIMDSRoundTripper struct{}

func (disableIMDSRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
	if req.Method == "PUT" && req.URL != nil && req.URL.Path == imdsv2Path {
		return nil, fmt.Error("disabled imdsv2")
	}
	return http.DefaultTransport.RoundTrip(req)
}

func NewDisableIMDSRoundTrip() http.RoundTripper {
	return disableIMDSRoundTripper{}
}

HTTPClient: &http.Client{
	Transport: NewDisableIMDSRoundTrip(),
},

[github-actions]

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