Clarify vCPU boost doc

[kunisen]

Description

In an internal discussion, we found the current vCPU doc - https://www.elastic.co/docs/deploy-manage/deploy/elastic-cloud/ec-vcpu-boost-instance is causing confusion and we get cases from customers / users due to the lack of below 2 pointers:

• vCPU credit is a bonus / gift (users get extra credit)
• vCPU credit is not always guaranteed and can be reset during essential maintenance activities.

Without these 2 pointers, it causes confusion that users think we are provide more vCPU resources (than expected) and Elastic is responsible for guaranteeing the vCPU credit behavior.

We want to update the doc to make more proper expectation. (internal ticket - link)

For reviewers

In addition to the default docs team's review, also:

• Requested @brendandw and @AlexP-Elastic for your kind review from control plane perspective
• Requested @jakommo for your kind review from support perspective

Preview

https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/2081/deploy-manage/deploy/elastic-cloud/ec-vcpu-boost-instance

[github-actions]

🔍 Preview links for changed docs

• deploy-manage/deploy/elastic-cloud/ec-vcpu-boost-instance.md

[shainaraskas]

small copyedit

[jakommo]

LGTM

[kunisen]

Thank you @jakommo and @shainaraskas!

I will merge this for now since we reached to a support and docs common agreement.
@brendandw please feel free to tweak the wording or tech details if you feel a need to do so.

Much appreciated your kind help again team!