[PM-22305] Upgrade typescript to 5.8 (#15044)

Upgrade to the latest supported typescript version in Angular.

Resolved TS errors by:
  - adding `: any` which is what the compiler previously implied and now warns about.
  - adding `toJSON` to satisfy requirement.

libs/common/src/vault/utils/observable-utilities.ts

@@ -30,7 +30,7 @@ export function perUserCache$<TValue>(
         create(userId),
         clearBuffer$.pipe(
           filter((clearId) => clearId === userId || clearId === null),
-          map(() => null),
+          map((): any => null),
         ),
       ).pipe(shareReplay({ bufferSize: 1, refCount: false }));
       cache.set(userId, observable);