chore(console): [SAS-161] Regenerate API types and fix unrelated breakage.

[rjimeno-mz]

Summary

yarn gen:api against current cloud/main picks up the name and usage fields SAS-141/SAS-145 added to the cost-breakdown response, but also pulls in ~6 other commits of unrelated API drift that accumulated in the same window. This is that regen plus the resulting fixes, landed as its own focused change so it doesn't drag unrelated region/environment-API changes into a billing-UI PR.

• cloudGlobalApi.ts: Regions type alias repointed to the schema's renamed Paginated_Region; getSelfManagedSubscription's path param renamed useCaseId → environmentId, matching the backend's own rename.
• upToDate (region "up to date" Kubernetes condition) went from optional to required. Added a "True" default at the 3 sites that construct these objects without a real value: the region mock builder, the fabricated self-managed/impersonation environment, and 2 test fixtures.
• Restored the license header the regen silently drops from all 3 generated schema files (no banner config in redocly.yaml), so the diff doesn't spuriously delete headers from 3 files.

Unblocks SAS-142 (render account display names) and SAS-159 (render per-cluster usage), both otherwise stuck waiting on these regenerated types.

Test plan

• yarn typecheck passes
• yarn lint passes
• yarn test --run — 722 passed, 1 skipped, 130 files

Linear: SAS-161

[linear-code]

SAS-161

[leedqin]

LGTM! Thank you for doing this. Please merge this and rebase before the other billing PR :)