Overloads for String.prototype.split method

[EzioMercer]

Fixes #53362
Fixes #61816

I'm verifying that:

• There is an associated issue in the Backlog milestone
• Code is up-to-date with the main branch
• I've successfully run hereby runtests locally
• There are new or updated unit tests validating the change

To be honest, I couldn't understand how to properly work with tests. At first attempt I had 108 errors when running tests but after running script hereby baseline-accept I had only 18 but I couldn't fix them (at least now)

In this playground I provided 20 test cases I think they will be useful for whom who will try to help me with tests

I will appreciate any help! Thank you for your attention!

[typescript-bot]

The TypeScript team hasn't accepted the linked issue #53362. If you can get it accepted, this PR will have a better chance of being reviewed.

[EzioMercer]

@microsoft-github-policy-service agree

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