[Security Solution] Skip flaky Cypress tests for bulk editing rule ac…

…tions (elastic#154722)

## Summary

The `detection_rules/bulk_edit_rules_actions.cy.ts` Cypress suite seems
to be flaky. Example build:


https://buildkite.com/elastic/kibana-pull-request/builds/118828#01876d53-8312-4590-8e88-dc2fdb4841a7

Follow-up issue: elastic#154721

x-pack/plugins/security_solution/cypress/e2e/detection_rules/bulk_edit_rules_actions.cy.ts

@@ -62,7 +62,8 @@ const expectedNumberOfRulesToBeEdited = expectedNumberOfCustomRulesToBeEdited +
 const expectedExistingSlackMessage = 'Existing slack action';
 const expectedSlackMessage = 'Slack action test message';
 
-describe('Detection rules, bulk edit of rule actions', () => {
+// TODO: Fix flakiness and unskip /~https://github.com/elastic/kibana/issues/154721
+describe.skip('Detection rules, bulk edit of rule actions', () => {
   before(() => {
     cleanKibana();
     login();