React 18 upgrade prework 2

[tephenavies]

• [x] Prerequisite #7050

What this PR does

Fix most typescript errors introduced by upgrading @types/react to 18, but don't actually upgrade package.json yet (this version bump will be in the last PR that bumps versions of all react packages).

Test me

Tested locally with tsc -b and tsc -b tsconfig-node.json. Main test is passing CI.

Checklist

• [ ] There are unit tests to verify my changes are correct or unit tests aren't applicable (if so, write quick reason why unit tests don't exist)
• [ ] I've updated relevant documentation in doc/.
• [ ] I've updated CHANGES.md with what I changed.
• [ ] I've provided instructions in the PR description on how to test this PR.