Currently a number of the benchmarks and tests are using api 31 instead of 33 for target and compile sdk versions. We should change these to use 33 instead (or flutter.compileSdkVersion, where possible).

We should also add documentation that indicates that we always use the latest targetSdkVersion, as there are no binary side effects and it gives you the most recent versions of linters, etc.

Also potentially the latest compileSdkVersion, though there are side effects (unlike targetSdkVersion).