Support TypeScript workers with isolated declarations and custom TypeScript #2000

Job	Run time
matrix-prep	3s
test-worker (7, 7.1.1)	6m 0s
test (7, 7.1.1, 1, ubuntu, .)	1m 29s
test (7, 7.1.1, 1, ubuntu, e2e/bzlmod)	22s
test (7, 7.1.1, 1, ubuntu, e2e/external_dep)	19s
test (7, 7.1.1, 1, ubuntu, e2e/external_dep/app)	23s
test (7, 7.1.1, 1, ubuntu, e2e/worker)	20s
test (7, 7.1.1, 0, ubuntu, .)	1m 19s
test (7, 7.1.1, 0, ubuntu, e2e/external_dep)	18s
test (7, 7.1.1, 0, ubuntu, e2e/external_dep/app)	19s
test (7, 7.1.1, 0, ubuntu, e2e/worker)	24s
test (7, 7.1.1, 0, ubuntu, e2e/workspace)	23s
test (6, 6.5.0, 0, ubuntu, e2e/external_dep)	17s
test (6, 6.5.0, 0, ubuntu, e2e/external_dep/app)	22s
test (6, 6.5.0, 0, ubuntu, e2e/worker)	22s
test (6, 6.5.0, 0, ubuntu, e2e/workspace)	17s
conclusion	3s
	13m 0s

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