chore: update typescript and jsii to 5.9 (#923)

Includes some small version related changes:
- remove override to use node 24.x in release workflows now that 24 is
the lts version
- add node 24 to integ tests

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

Author: mrgrain

.github/workflows/integ.yml

@@ -19,7 +19,7 @@ import { TypecheckTests } from './projenrc/TypecheckTests';
 
 // #region shared config
 
-const TYPESCRIPT_VERSION = '5.8';
+const TYPESCRIPT_VERSION = '5.9';
 
 /**
  * When adding an SDK dependency for a library, use this function
@@ -244,7 +244,6 @@ const repoProject = new yarn.Monorepo({
   releaseOptions: {
     publishToNpm: true,
     releaseTrigger: pj.release.ReleaseTrigger.workflowDispatch(),
-    nodeVersion: '24.x',
   },
 
   depsUpgradeOptions: {
@@ -1680,7 +1679,7 @@ new CdkCliIntegTestsWorkflow(repo, {
   additionalNodeVersionsToTest: [
     // 18.18 introduces `Symbol.dispose`, and we need to make sure that we work on older versions as well
     '18.17.0',
-    '20', '22',
+    '20', '22', '24',
   ],
 });