[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/auth/services/webauthn-login/webauthn-login.service.spec.ts

@@ -38,7 +38,7 @@ describe("WebAuthnLoginService", () => {
 
     // We must do this to make the mocked classes available for all the
     // assertCredential(...) tests.
-    global.PublicKeyCredential = MockPublicKeyCredential;
+    global.PublicKeyCredential = MockPublicKeyCredential as any;
     global.AuthenticatorAssertionResponse = MockAuthenticatorAssertionResponse;
 
     // Save the original navigator
@@ -316,6 +316,10 @@ class MockPublicKeyCredential implements PublicKeyCredential {
   static isUserVerifyingPlatformAuthenticatorAvailable(): Promise<boolean> {
     return Promise.resolve(false);
   }
+
+  toJSON() {
+    throw new Error("Method not implemented.");
+  }
 }
 
 function buildCredentialAssertionOptions(): WebAuthnLoginCredentialAssertionOptionsView {

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);