Add test262 repo

[jakebailey]

Surprise, we debug assert!

/home/jabaile/work/TypeScript/lib/tsc.js:109818
      throw e;
      ^

Error: Debug Failure.
    at getAwaitedTypeNoAlias (/home/jabaile/work/TypeScript/lib/tsc.js:73517:15)
    at Object.getAwaitedType [as resolveIterationType] (/home/jabaile/work/TypeScript/lib/tsc.js:73463:25)
    at getIterationTypesOfMethod (/home/jabaile/work/TypeScript/lib/tsc.js:75377:47)
    at getIterationTypesOfIteratorSlow (/home/jabaile/work/TypeScript/lib/tsc.js:75398:7)
    at getIterationTypesOfIteratorWorker (/home/jabaile/work/TypeScript/lib/tsc.js:75217:64)
    at getIterationTypesOfIterableSlow (/home/jabaile/work/TypeScript/lib/tsc.js:75178:35)
    at getIterationTypesOfIterableWorker (/home/jabaile/work/TypeScript/lib/tsc.js:75087:30)
    at getIterationTypesOfIterable (/home/jabaile/work/TypeScript/lib/tsc.js:74992:31)
    at getIteratedTypeOrElementType (/home/jabaile/work/TypeScript/lib/tsc.js:74839:30)
    at checkIteratedTypeOrElementType (/home/jabaile/work/TypeScript/lib/tsc.js:74820:12)

Node.js v19.7.0

[jakebailey]

Merging in now in hopes we get the above in a trace overnight.