[ML] Adding cloud trial end date to ml info

[jgowdyelastic]

Adds a isCloudTrial flag to ML's /api/ml/info endpoint.
If xpack.cloud.trial_end_date is set in the kibana config and it is greater than the current time, we can assume that we're currently in a could trial.
If xpack.cloud.trial_end_date is not set, isCloudTrial is not added to the endpoint response. This is the same behaviour as the cloudId property.

Adds a isCloudTrial() function to our server info util functions which can be used in conjunction with our isCloud() function.

To test, these cloud settings can be added to the kibana config:

xpack.cloud.id: 'cloud_message_test:ZXUtd2VzdC0yLmF3cy5jbG91ZC5lcy5pbyQ4NWQ2NjZmMzM1MGM0NjllOGMzMjQyZDc2YTdmNDU5YyQxNmI1ZDM2ZGE1Mzk0YjlkYjIyZWJlNDk1OWY1OGQzMg=='
xpack.cloud.trial_end_date: '2022-11-20T09:39:52.554Z'

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 3005c75
• Cloud Deployment

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
ml	3.3MB	3.3MB	+363.0B

Unknown metric groups

ESLint disabled in files

id	before	after	diff
osquery	1	2	+1

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
fleet	59	65	+6
osquery	108	113	+5
securitySolution	440	446	+6
total			+19

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
fleet	67	73	+6
osquery	109	115	+6
securitySolution	517	523	+6
total			+20

History

• 💔 Build #86538 failed b856b37
• 💔 Build #86236 failed f32c0ed
• 💚 Build #86205 succeeded c4f04cc
• 💔 Build #86156 failed 0cf4de2

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

cc @jgowdyelastic

[darnautov]

LGTM! Would be great to extend to the KibanaContextProvider with this info as well

[jgowdyelastic]

LGTM! Would be great to extend to the KibanaContextProvider with this info as well

Yes, that's a good idea. Outside of the scope of this PR, but I can add it in a follow up.