Update CPS placeholder pricing

[shainaraskas]

Summary

• Fixes https://github.com/elastic/docs-content-internal/issues/1500
• Repositions pricing preview to reflect new pricing model

Because pricing approach no longer varies by origin project type, I removed the project type-specific info on the billing dimension child pages.

cc: @yetanothertw this should simplify your work a touch

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1. Did you use a generative AI (GenAI) tool to assist in creating this contribution?

• Yes
• No

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🔍 Preview links for changed docs

• deploy-manage/cloud-organization/billing/elastic-observability-billing-dimensions.md
• deploy-manage/cloud-organization/billing/security-billing-dimensions.md

[github-actions]

✅ Elastic Docs Style Checker (Vale)

No issues found on modified lines!

---

The Vale linter checks documentation changes against the Elastic Docs style guide. To use Vale locally or report issues, refer to Elastic style guide for Vale.

[eedugon]

LGTM!

Next time when modifying a snippet please include the preview link of at least one of the pages that use the snippet, as otherwise is difficult to find out :)

[yetanothertw]

Thanks for the ping! I'll make sure to pull these changes into my branch.

Left a tiny comment for simplification. 🌻

[github-actions]

Docs review summary

Focus areas

• Style and clarity: Vale flagged only a pre-existing execute word-choice suggestion (unrelated to this diff, line untouched) and a routine mapped_pages warning (metadata unchanged by this PR). One inline suggestion posted on deploy-manage/_snippets/cps-billing.md for a hard-to-parse sentence introduced by the rewrite.
• Jargon: No unexplained Elastic-internal jargon introduced. {{cps}}/{{cps-cap}}/{{cps-init}} substitutions expand correctly and CPS is spelled out on first use at each transclusion site (cross-project-search-config.md, serverless-project-billing-dimensions.md).
• Frontmatter and applies_to: No frontmatter changed by this PR. The applies_to: serverless: preview blocks that gated the now-removed per-product CPS sections were deleted along with those sections — no orphaned applies_to blocks remain.
• Content type fit: No mismatch. This is a reference/how-to billing page and the changes are in-place prose edits, consistent with the existing structure.
• Parent issue satisfaction: Satisfied. The PR fixes elastic/docs-content-internal#1500 by removing project-type-specific CPS billing language and replacing it with a single unified snippet, per the pricing model change described in the PR body.

Notes

• Verified no dangling references remain to the removed anchors (observability-billing-cps, security-billing-cps) or the deleted snippet _snippets/cps-billing-obs-sec.md — repo-wide search found none.
• The consolidated _snippets/cps-billing.md is transcluded from two other pages (cross-project-search-config.md and serverless-project-billing-dimensions.md), and both read correctly with the new unified content.

Generated by Docs review agent for #7552 · sonnet 162.8 AIC · ⌖ 9.04 AIC · ⊞ 866