Modify NewSDK(): Hardcode localhost

[Kalaiselvi84]

What type of PR is this?

Uncomment only one /kind <> line, press enter to put that in a new line, and remove leading whitespace from that line:

/kind breaking
/kind bug
/kind cleanup
/kind documentation
/kind feature
/kind hotfix
/kind release

What this PR does / Why we need it:

Which issue(s) this PR fixes:

Closes #3634

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: eed8d681-970c-48dd-a8c0-ef643e575f6b

The following development artifacts have been built, and will exist for the next 30 days:

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.39.0-dev-3ff5d01-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.39.0-dev-3ff5d01-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.39.0-dev-3ff5d01-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.39.0-dev-3ff5d01-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.39.0-dev-3ff5d01-amd64
• Linux C++ SDK (build): agonessdk-1.39.0-dev-3ff5d01-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.39.0-dev-3ff5d01-amd64.zip

A preview of the website (the last 30 builds are retained):

• https://3ff5d01-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3676/head:pr_3676 && git checkout pr_3676
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.39.0-dev-3ff5d01-amd64

[Kalaiselvi84]

I tested it like this:

kalaiselvim@mkalai:~/Desktop/agones$ export AGONES_SDK_GRPC_HOST=localhost
kalaiselvim@mkalai:~/Desktop/agones$ export AGONES_SDK_GRPC_PORT=9357
================

test-newSDK/main.go:
--------------------
package main

import (
    "fmt"
    "log"
	sdk "agones.dev/agones/sdks/go"

)

func main() {
	log.Print("Creating SDK instance")
	sdk, err := sdk.NewSDK()
	if err != nil {
		log.Fatalf("Could not connect to sdk: %v", err)
	}
    fmt.Println("SDK successfully created:", sdk)
}
============================

kalaiselvim@mkalai:~/Desktop/agones/examples/test-newSDK$ go run main.go 
2024/02/29 01:40:03 Creating SDK instance
SDK successfully created: &{0xc000025720 {{}} 0xc000025790 0xc0000257b0}

please review the changes and share your feedback..

[agones-bot]

Build Succeeded 👏

Build Id: 58f64498-0a86-4c17-b476-790decabe2a3

The following development artifacts have been built, and will exist for the next 30 days:

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.39.0-dev-77c7a98-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.39.0-dev-77c7a98-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.39.0-dev-77c7a98-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.39.0-dev-77c7a98-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.39.0-dev-77c7a98-amd64
• Linux C++ SDK (build): agonessdk-1.39.0-dev-77c7a98-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.39.0-dev-77c7a98-amd64.zip

A preview of the website (the last 30 builds are retained):

• https://77c7a98-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3676/head:pr_3676 && git checkout pr_3676
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.39.0-dev-77c7a98-amd64

[markmandel]

LGTM!

[agones-bot]

Build Succeeded 👏

Build Id: 049fe7d5-9d38-4c05-aa57-74428facb8d6

The following development artifacts have been built, and will exist for the next 30 days:

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.39.0-dev-8ed7477-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.39.0-dev-8ed7477-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.39.0-dev-8ed7477-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.39.0-dev-8ed7477-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.39.0-dev-8ed7477-amd64
• Linux C++ SDK (build): agonessdk-1.39.0-dev-8ed7477-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.39.0-dev-8ed7477-amd64.zip

A preview of the website (the last 30 builds are retained):

• https://8ed7477-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3676/head:pr_3676 && git checkout pr_3676
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.39.0-dev-8ed7477-amd64