Separate the Helm value for the allocator service name from its service account name

[rcreasey]

What type of PR is this?
/kind bug

What this PR does / Why we need it:
Separates the allocation service name from allocation service account name during a helm installation. There are instances where I want to use the default agones-allocator service account name, yet customize the actual service name. Additionally, should the service account name require updates, this will also impact the allocation service name (which could cause breaking changes to workloads depending on that fqdn).

[agones-bot]

Build Failed 😱

Build Id: 33d05f0a-3266-4f73-ad19-126d2c1eafe2

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[roberthbailey]

I'm all for making the names separate, but can you do something like

allocator:
  install: true
  ...
  service:
    name: agones-allocator
  ...

instead, since that will align with how we are planning to restructure the service configs in #2263?

[rcreasey]

I'm all for making the names separate, but can you do something like

allocator:
  install: true
  ...
  service:
    name: agones-allocator
  ...

instead, since that will align with how we are planning to restructure the service configs in #2263?

For sure. This was actually my first reaction to making the change, but didn't see nested scope on any of the other variables. Will update accordingly.

[agones-bot]

Build Failed 😱

Build Id: dc6e7b0a-dcc7-4253-9c02-143fd188c9f4

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[roberthbailey]

Looks like a test flake. Can you rebase on main and re-push your branch? (I can't update your branch for you)

[roberthbailey]

For the new field, please add it to the table below (line 192) so that it doesn't appear in the docs until the next release. Thanks!

[agones-bot]

Build Succeeded 👏

Build Id: d72733a5-6fde-43b3-be2c-9770f34d46ec

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

• image: gcr.io/agones-images/agones-controller:1.18.0-f716f2f
• image: gcr.io/agones-images/agones-ping:1.18.0-f716f2f
• Linux C++ SDK (build): agonessdk-1.18.0-f716f2f-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.18.0-f716f2f.zip

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

• https://f716f2f-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/2268/head:pr_2268 && git checkout pr_2268
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.18.0-f716f2f

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rcreasey, roberthbailey

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