Provide lib/target suggestions for findLast/findLastIndex

[DanielRosenwasser]

Once #49636 goes in, we should ensure that a user gets suggestions for using findLast/findLastIndex when their output target or lib is too low.

function findLastZeroIndex(arr: number[]) {
  return arr.findLastIndex(0);
}

We already do this for other missing methods.

[OliverRadini]

Are you happy for anyone to take a look at this? Looking to find an issue to work on

[DanielRosenwasser]

Go for it. The code is in getScriptTargetFeatures. Add a new entry for es2023 containing entries for Array and all the TypedArray variants.

TypeScript/src/compiler/utilities.ts

Line 1180 in cb4c768

export function getScriptTargetFeatures(): ScriptTargetFeatures {