openapi-typescript Fix prefixItems / minItems / maxItems tuple generation (#2053)

🗣️ Discussion

This PR is an extraction of some work that has already landed in the 8.x branch. This is my first step in porting those changes to the 7.x branch.

Closes #2048

Changes

Simplify minItems / maxItems tuple generation
Introduces @total-typescript to accommodate Array.prototype.filter(Boolean) pattern
Extract subroutine for transforming array schema objects
Support items: false; prefixItems: … schemas; treat prefixItems as explicit tuple value.
Support items: […schemas], treating items as explicit tuple value.

How to Review

[ ] Ensure changes to newly-generated types are valid bug-fixes
[ ] Ensure old behaviors are preserved where appropriate, to break fewer things when we release
[ ] Ensure new behavior is gated behind --experimental-array-spread-members flag
[ ] Ensure ts-reset types don't affect published openapi-ts types
- ts-reset behaviors should not be active in plain repo with openapi-ts dependency
- Importing openapi-ts for programmatic use shouldn't start allowing ts-reset behaviors.
[ ] Ensure ts-reset types don't affect generated types
- Importing openapi-typescript-generated types shouldn't start allowing ts-reset behavior.

🔧 Backwards-compatibility

In order to get a sense for the backwards-compatibility of this PR I pulled the full suite of tests from array.test.ts and ran them in main. Test output

Many test cases in this corpus cover behavior not-yet-tested in main, so this gives us a better sense of what will actually change.

Many of the new tests (expectedly) failed in this older context, and the errors fell into four categories.