build: update to TypeScript 5.9 beta #6839

Job	Run time
lint	2m 5s
analyze	5s
build	5m 13s
test	13m 7s
e2e-windows-subset	9m 13s
e2e-package-managers (ubuntu-latest, 22, yarn, 0)	7m 37s
e2e-package-managers (ubuntu-latest, 22, pnpm, 2)	5m 22s
e2e-package-managers (ubuntu-latest, 22, yarn, 2)	6m 11s
e2e (ubuntu-latest, 22, npm, 3)	9m 17s
e2e-package-managers (ubuntu-latest, 22, pnpm, 1)	4m 29s
e2e (ubuntu-latest, 22, esbuild, 3)	8m 51s
e2e-package-managers (ubuntu-latest, 22, yarn, 1)	5m 38s
e2e (ubuntu-latest, 22, npm, 0)	10m 2s
e2e-package-managers (ubuntu-latest, 22, pnpm, 0)	5m 39s
e2e (ubuntu-latest, 22, npm, 1)	11m 32s
e2e (ubuntu-latest, 22, npm, 4)	7m 47s
e2e (ubuntu-latest, 22, npm, 2)	10m 36s
e2e (ubuntu-latest, 22, npm, 5)	9m 49s
e2e (ubuntu-latest, 22, esbuild, 0)	7m 0s
e2e (ubuntu-latest, 22, esbuild, 2)	9m 23s
e2e (ubuntu-latest, 22, esbuild, 5)	5m 57s
e2e (ubuntu-latest, 22, esbuild, 1)	8m 57s
e2e (ubuntu-latest, 22, esbuild, 4)	6m 50s
e2e-snapshots	0s
	2h 50m 40s

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