Checker accepts definite assignment assertions on static fields #3635

class C { static value!: number; }

SharpTS at 72455db66 accepts this with --no-tsconfig --strict --noEmit. TypeScript 6.0.3 reports TS1255 with --ignoreConfig --strict --target ES2022 --noEmit because a definite assignment assertion is disallowed on a static field.

Found while verifying the static-field read diagnostic in #3621.