[7.x] Ensure rule message do not span multiple lines (#62391)

[rylnd]

Backports the following commits to 7.x:

• Ensure rule message do not span multiple lines ([SIEM] Ensure rule message do not span multiple lines #62391)

[kibanamachine]

💛 Build succeeded, but was flaky

• continuous-integration/kibana-ci/pull-request
• Commit: 24353c8
• Flaky suites:
  • xpack-siemCypress

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Test Failures

Kibana Pipeline / kibana-xpack-agent / Closes and opens signals.Detections Closing signals Closes and opens signals

Link to Jenkins

Standard Out

Failed Tests Reporter:
  - Test has failed 14 times on tracked branches: https://github.com/elastic/kibana/issues/61132

Stack Trace

CypressError: Timed out retrying: expected '0' to equal '105'
    at cypressErr (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:138644:9)
    at throwErr (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:138577:11)
    at Object.throwErrByPath (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:138625:3)
    at retry (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:132905:19)
    at onFailFn (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:121122:16)
    at tryCatcher (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:165465:23)
    at Promise._settlePromiseFromHandler (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:163401:31)
    at Promise._settlePromise (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:163458:18)
    at Promise._settlePromise0 (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:163503:10)
    at Promise._settlePromises (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:163578:18)
    at Async../node_modules/bluebird/js/release/async.js.Async._drainQueue (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:160190:16)
    at Async../node_modules/bluebird/js/release/async.js.Async._drainQueues (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:160200:10)
    at Async.drainQueues (http://elastic:changeme@localhost:61121/__cypress/runner/cypress_runner.js:160074:14)

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