[7.x] [Security Solution][RAC] - Add reason field (#107532)

[michaelolo24]

Backports the following commits to 7.x:

• [Security Solution][RAC] - Add reason field ([Security Solution][RAC] - Add reason field #107532)

[kibanamachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request
• Commit: 86944df
• Storybooks Preview
• Pipeline Steps (look for red circles / failed steps)
• Interpreting CI Failures

Failed CI Steps

• Execute xpack-securitySolutionCypressChrome
• Execute xpack-securitySolutionCypressChrome

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Test Failures

Kibana Pipeline / general / Displays the unmapped field on the table.Alert details with unmapped fields Displays the unmapped field on the table

Link to Jenkins

Stack Trace

Failed Tests Reporter:
  - Test has not failed recently on tracked branches

AssertionError: Timed out retrying after 60000ms: expected '<div.euiText.euiText--extraSmall>' to have text 'unmapped', but the text was 'signal.status'
    at Context.eval (http://localhost:6121/__cypress/tests?p=cypress/integration/detection_alerts/alerts_details.spec.ts:20812:54)

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Kibana Pipeline / general / Displays the unmapped field on the table.Alert details with unmapped fields Displays the unmapped field on the table

Link to Jenkins

Stack Trace

Failed Tests Reporter:
  - Test has failed 1 times on tracked branches: https://dryrun

AssertionError: Timed out retrying after 60000ms: expected '<div.euiText.euiText--extraSmall>' to have text 'unmapped', but the text was 'signal.status'
    at Context.eval (http://localhost:6121/__cypress/tests?p=cypress/integration/detection_alerts/alerts_details.spec.ts:20812:54)

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Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
securitySolution	6.5MB	6.5MB	-574.0B
timelines	267.6KB	267.6KB	+16.0B
total			-558.0B

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream