docs: add gcp provider

[jwcesign]

Fixes #N/A

Description

We’ve just released the Alibaba Cloud provider: https://github.com/cloudpilot-ai/karpenter-provider-alibabacloud/releases. Excitingly, some end users are already leveraging this initial version to manage their clusters for Spark Jobs.

Our next step is to bring this solution to GCP. We’re confident we can improve upon it and deliver the best possible experience to the community users.

This marks a significant milestone for the Karpenter community—once GCP is supported, Karpenter will extend its reach to the leading three cloud providers: AWS, Azure, and GCP.

How was this change tested?
none

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[k8s-ci-robot]

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[coveralls]

Pull Request Test Coverage Report for Build 12014454797

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 13 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.06%) to 80.984%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/test/cachesyncingclient.go	2	82.29%
pkg/scheduling/requirements.go	2	98.01%
pkg/utils/termination/termination.go	4	87.18%
pkg/controllers/node/termination/controller.go	5	69.07%

Totals
Change from base Build 11994809568:	-0.06%
Covered Lines:	8837
Relevant Lines:	10912

---

💛 - Coveralls

[jonathan-innis]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jonathan-innis, jwcesign

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