Fix regression in WeakMap constructor type (#54592)

Author: rbuckton

src/lib/es2015.collection.d.ts

@@ -64,7 +64,7 @@ interface WeakMap<K extends WeakKey, V> {
 }
 
 interface WeakMapConstructor {
-    new <K extends WeakKey = WeakKey, V = any>(entries?: readonly [K, V][] | null): WeakMap<K, V>;
+    new <K extends WeakKey = WeakKey, V = any>(entries?: readonly (readonly [K, V])[] | null): WeakMap<K, V>;
     readonly prototype: WeakMap<WeakKey, any>;
 }
 declare var WeakMap: WeakMapConstructor;

tests/baselines/reference/dissallowSymbolAsWeakType.errors.txt

@@ -21,7 +21,7 @@ dissallowSymbolAsWeakType.ts(8,12): error TS2769: No overload matches this call.
               Type '[symbol, false]' is not assignable to type 'readonly [object, boolean]'.
                 Type at position 0 in source is not compatible with type at position 0 in target.
                   Type 'symbol' is not assignable to type 'object'.
-  Overload 2 of 2, '(entries?: readonly [object, boolean][]): WeakMap<object, boolean>', gave the following error.
+  Overload 2 of 2, '(entries?: readonly (readonly [object, boolean])[]): WeakMap<object, boolean>', gave the following error.
     Type 'symbol' is not assignable to type 'object'.
 dissallowSymbolAsWeakType.ts(9,8): error TS2345: Argument of type 'symbol' is not assignable to parameter of type 'object'.
 dissallowSymbolAsWeakType.ts(10,8): error TS2345: Argument of type 'symbol' is not assignable to parameter of type 'object'.
@@ -69,7 +69,7 @@ dissallowSymbolAsWeakType.ts(19,14): error TS2345: Argument of type 'symbol' is
 !!! error TS2769:               Type '[symbol, false]' is not assignable to type 'readonly [object, boolean]'.
 !!! error TS2769:                 Type at position 0 in source is not compatible with type at position 0 in target.
 !!! error TS2769:                   Type 'symbol' is not assignable to type 'object'.
-!!! error TS2769:   Overload 2 of 2, '(entries?: readonly [object, boolean][]): WeakMap<object, boolean>', gave the following error.
+!!! error TS2769:   Overload 2 of 2, '(entries?: readonly (readonly [object, boolean])[]): WeakMap<object, boolean>', gave the following error.
 !!! error TS2769:     Type 'symbol' is not assignable to type 'object'.
     wm.set(s, true);
            ~