Add many more tests for array behavior and update scenarios

[markerikson]

This PR:

• Adds a fairly extensive set of additional tests to base.js covering expected array method behavior
• Adds a set of "update scenario" tests that match the scenarios in the immutability benchmarks file. This both adds assertions that Immer's results match a vanilla JS reducer, and gives a handy way to rerun an individual test to drill down on Immer behavior in development.

Some of the array tests were related to edge cases I thought of (such as touching an array field to create a proxy, then sorting or reversing it). The majority were AI-generated to fill out expected behaviors before I started trying to override any array methods.

[coveralls]

Pull Request Test Coverage Report for Build 18285951986

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 54.732%

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Totals
Change from base Build 17672956739:	0.03%
Covered Lines:	1236
Relevant Lines:	2681

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💛 - Coveralls

[markerikson]

@mweststrate Since you did give me commit rights, I'm going to go ahead and land any infrastructure-related PRs (tests, perf benchmarks, CI improvements) on my own. I'll defer on any of the actual behavior changes so that you can review and we can discuss them.

[github-actions]

🎉 This PR is included in version 10.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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