Forbid unused property renaming in destructuring binding in function types

[uhyo]

Happy hacktoberfest!! 🎃🥳

Fixes #37454.

The PR implements mainly two things, as suggested in #41044 (comment):

• Emit an error for property renaming in destructing binding in function types if it is unused. This is not under noUnusedLocals nor noUnusedParameters, but declaration files are not checked.
• Changes declaration emit so that property renaming in destructing bunding is removed if it is unused.

Example

type O = { a?: string; b: number; c: number; };
type F1 = (arg: number) => any; // OK
type F2 = ({ a: string }: O) => any; // Error
type F3 = ({ a: string, b, c }: O) => any; // Error
type F4 = ({ a: string }: O) => any; // Error
type F5 = ({ a: string, b, c }: O) => any; // Error
type F6 = ({ a: string }) => typeof string; // OK
type F7 = ({ a: string, b: number }) => typeof number; // Error
type F8 = ({ a, b: number }) => typeof number; // OK
type F9 = ([a, b, c]) => void; // Error

type G1 = (arg: number) => any; // OK
type G2 = ({ a: string }: O) => any; // Error
type G3 = ({ a: string, b, c }: O) => any; // Error
type G4 = ({ a: string }: O) => any; // Error
type G5 = ({ a: string, b, c }: O) => any; // Error
type G6 = ({ a: string }) => typeof string; // OK
type G7 = ({ a: string, b: number }) => typeof number; // Error
type G8 = ({ a, b: number }) => typeof number; // OK
type G9 = ([a, b, c]) => void; // Error

Results

All the errors below are new in this PR.

src/index.ts:3:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

3 type F2 = ({ a: string }: O) => any; // Error
                  ~~~~~~

src/index.ts:4:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

4 type F3 = ({ a: string, b, c }: O) => any; // Error
                  ~~~~~~

src/index.ts:5:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

5 type F4 = ({ a: string }: O) => any; // Error
                  ~~~~~~

src/index.ts:6:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

6 type F5 = ({ a: string, b, c }: O) => any; // Error
                  ~~~~~~

src/index.ts:8:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

8 type F7 = ({ a: string, b: number }) => typeof number; // Error
                  ~~~~~~

src/index.ts:13:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

13 type G2 = ({ a: string }: O) => any; // Error
                   ~~~~~~

src/index.ts:14:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

14 type G3 = ({ a: string, b, c }: O) => any; // Error
                   ~~~~~~

src/index.ts:15:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

15 type G4 = ({ a: string }: O) => any; // Error
                   ~~~~~~

src/index.ts:16:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

16 type G5 = ({ a: string, b, c }: O) => any; // Error
                   ~~~~~~

src/index.ts:18:17 - error TS2842: Variable 'string' is not used. Did you mean to write a type annotation for whole object?

18 type G7 = ({ a: string, b: number }) => typeof number; // Error
                   ~~~~~~


Found 10 errors in the same file, starting at: src/index.ts:3