chore(ci): optimise runners, distribute test shards #8415

Job	Run time
Detect changes	8s
code-quality / code-quality	1m 28s
typecheck / typecheck	3m 1s
internal / 🧪 Unit Tests: Internal	6m 29s
e2e / 🧪 CLI v3 tests (warp-windows-latest-x64-8x - npm)	4m 5s
e2e / 🧪 CLI v3 tests (warp-ubuntu-latest-x64-4x - npm)	2m 11s
e2e / 🧪 CLI v3 tests (warp-ubuntu-latest-x64-4x - pnpm)	2m 1s
e2e-webapp / 🧪 E2E Tests: Webapp	2m 32s
webapp / 🧪 Unit Tests: Webapp (3, 12)	6m 38s
webapp / 🧪 Unit Tests: Webapp (1, 12)	6m 10s
e2e / 🧪 CLI v3 tests (warp-windows-latest-x64-8x - pnpm)	3m 49s
webapp / 🧪 Unit Tests: Webapp (6, 12)	6m 7s
webapp / 🧪 Unit Tests: Webapp (9, 12)	6m 38s
webapp / 🧪 Unit Tests: Webapp (2, 12)	6m 5s
webapp / 🧪 Unit Tests: Webapp (12, 12)	6m 45s
webapp / 🧪 Unit Tests: Webapp (5, 12)	6m 15s
webapp / 🧪 Unit Tests: Webapp (10, 12)	6m 11s
webapp / 🧪 Unit Tests: Webapp (11, 12)	6m 23s
webapp / 🧪 Unit Tests: Webapp (4, 12)	6m 30s
webapp / 🧪 Unit Tests: Webapp (8, 12)	6m 24s
webapp / 🧪 Unit Tests: Webapp (7, 12)	6m 42s
sdk-compat	0s
packages	0s
webapp / 📊 Merge Reports	23s
All PR Checks	5s
	1h 43m 0s

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