## What kind of change does this PR introduce?
Copy/label update in Studio's compute surfaces.
## Description
Compute CPU descriptions now branch on the compute size tier:
- Sizes below Large read **"Shared compute"** (no core count)
- Large and up read **"Dedicated · N vCPUs"** — the unit is always vCPU
Changes:
- New `lib/compute-labels.ts` helper (`isSharedComputeSize`,
`getComputeCpuLabel`) with unit tests
- Compute badge hover card, compute size picker, and project-creation
selector use the new labels
- `new-project.constants.ts` cpu strings updated accordingly
- ">16XL" card: "Custom CPU" → "Custom compute"; upsell copy now says
"64 vCPUs"
- The synthetic Nano/Micro addon `meta` no longer has
`cpu_cores`/`cpu_dedicated`; removed the now-unused cpu fields from the
hardcoded instance specs
- Project-creation sub-text: "Larger, dedicated compute available after
creation"
## Tests
- New unit tests for the label helper
- Infrastructure settings page test now asserts the rendered labels
Fixes PROD-663
Related #49998#49996
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **User Interface**
* Updated compute-size labels to use “Shared compute” and vCPU
terminology.
* Clarified dedicated compute options and availability messaging.
* Updated custom instance and upgrade labels, including “Custom compute”
and “64 vCPUs.”
* **Consistency**
* Standardized compute labels across project creation, infrastructure
settings, and compute details.
* **Tests**
* Added coverage verifying shared and dedicated compute classifications
and displayed labels.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
