[Cloud Security] skip Old Data FTR test suit until the fix is impleme…

…nted (#171721)

## Summary

The test suit seems to cause failures 

https://buildkite.com/elastic/kibana-pull-request/builds/177222#018bf17a-bded-4681-a408-7c2e19c137b7

https://buildkite.com/elastic/kibana-pull-request/builds/177814#018bf5a4-8b63-4110-8acf-c1d4891867db

https://buildkite.com/elastic/kibana-pull-request/builds/177817#018bf5b3-6129-4ac0-a032-df5ca1ba3b72

Skipping until the fix in
https://github.com/elastic/kibana/pull/171717/files is confirmed on the
flaky test runner

x-pack/test/cloud_security_posture_functional/pages/findings_old_data.ts

@@ -55,7 +55,7 @@ export default function ({ getPageObjects, getService }: FtrProviderContext) {
     },
   ];
 
-  describe('Old Data', function () {
+  describe.skip('Old Data', function () {
     this.tags(['cloud_security_posture_findings']);
     let findings: typeof pageObjects.findings;