GolangCI-lint updating version to 1.30

[aLekSer]

Add exportloopref which is a successor of obsoleted scopelint.
Disable unnecessaryDefer which are located right before return.

What type of PR is this?

/kind cleanup

What this PR does / Why we need it:

Updating Golangci-lint version and added a successor of scopelint which is obsolete.

Which issue(s) this PR fixes:

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: a3760ecf-6989-4a18-bafd-0b0e550958ed

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

• image: gcr.io/agones-images/agones-controller:1.9.0-271255f
• image: gcr.io/agones-images/agones-sdk:1.9.0-271255f
• image: gcr.io/agones-images/agones-ping:1.9.0-271255f
• Linux C++ SDK (build): agonessdk-1.9.0-271255f-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.9.0-271255f.zip

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

• https://271255f-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/1785/head:pr_1785 && git checkout pr_1785
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.9.0-271255f

[agones-bot]

Build Succeeded 👏

Build Id: dfb98e91-bcf0-4535-9427-2bc3510a3123

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

• image: gcr.io/agones-images/agones-controller:1.9.0-4cad758
• image: gcr.io/agones-images/agones-sdk:1.9.0-4cad758
• image: gcr.io/agones-images/agones-ping:1.9.0-4cad758
• Linux C++ SDK (build): agonessdk-1.9.0-4cad758-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.9.0-4cad758.zip

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

• https://4cad758-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/1785/head:pr_1785 && git checkout pr_1785
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.9.0-4cad758

[markmandel]

Nice!

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aLekSer, markmandel

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [aLekSer,markmandel]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[google-oss-robot]

New changes are detected. LGTM label has been removed.

[agones-bot]

Build Succeeded 👏

Build Id: f7a5693a-aa41-4f53-bc7e-a9b6f26475fa

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

• image: gcr.io/agones-images/agones-controller:1.9.0-7aa3f7c
• image: gcr.io/agones-images/agones-sdk:1.9.0-7aa3f7c
• image: gcr.io/agones-images/agones-ping:1.9.0-7aa3f7c
• Linux C++ SDK (build): agonessdk-1.9.0-7aa3f7c-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.9.0-7aa3f7c.zip

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

• https://7aa3f7c-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/1785/head:pr_1785 && git checkout pr_1785
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.9.0-7aa3f7c