chore: fix core tests (#24825)

In the build pipeline the version in `package.json` is updated causing some tests to fail that are expecting a the `0.0.0` version. I've refactored the tests to accommodate. 

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: corymhall

packages/@aws-cdk/core/test/validation/trace.test.ts

@@ -31,7 +31,7 @@ describe('ReportTrace', () => {
       expect(formatted).toEqual({
         id: 'MyStack',
         construct: expect.stringMatching(/.*Stack/),
-        libraryVersion: '0.0.0',
+        libraryVersion: expect.any(String),
         location: expect.stringMatching(/Object.<anonymous> \(.*\/trace.test.ts:[0-9]+:[0-9]+\)/),
         path: 'MyStack',
         child: {
@@ -64,7 +64,7 @@ describe('ReportTrace', () => {
     expect(formatted).toEqual({
       id: 'MyStack',
       construct: expect.stringMatching(/.*Stack/),
-      libraryVersion: '0.0.0',
+      libraryVersion: expect.any(String),
       location: "Run with '--debug' to include location info",
       path: 'MyStack',
       child: {