[Monitoring] Skip tests for cloud

[chrisronline]

Relates to https://github.com/elastic/stack-monitoring/issues/31
Resolves #30707
Resolves #30708
Resolves #30709
Resolves #30713

This PR adds logic to skip certain monitoring tests for cloud. The reasons are explained in each ticket. In the future, we can resolve these properly, but skipping for now will help avoid these unnecessary failures. None of the failures are due to an actual bug in the code.

[elasticmachine]

Pinging @elastic/stack-monitoring

[ycombinator]

@chrisronline I'm okay with the skips here as long as we have an issue to re-enable these tests with the proper resolution. Could you create such an issue (if necessary) and link to it from a TODO comment above each this.tags(['skipCloud']); line introduced in this PR?

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[ycombinator]

@chrisronline In your TODO comments you linked to https://github.com/elastic/stack-monitoring/issues/31. But according to this PR's description, merging this PR will resolve https://github.com/elastic/stack-monitoring/issues/31. This causes two problems, IMO:

1. Fast forward say 6 months when we see the TODOs in the tests code. We'll follow the link, see a closed issue and think the TODO comments are stale instead of thinking that there's actual work to be done.

2. https://github.com/elastic/stack-monitoring/issues/31 would be closed (by this PR) so we have no open issue tracking the actual pending work of re-enabling these skipped tests with proper resolutions.

I'd prefer creating a new issue (separate from https://github.com/elastic/stack-monitoring/issues/31) that's clearly about re-enabling the tests with proper resolution and linking to that issue from the TODO comments. But if you think this is unnecessary and we won't lose track of these skipped tests, then this PR LGTM.

[chrisronline]

I'd prefer to keep a single ticket. I'm going to update the ticket to include this better.

[ycombinator]

LGTM.

[elasticmachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request

[chrisronline]

retest

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[chrisronline]

Backport:

7.x: b327085
7.0: 85ce5e6
6.7: b2fbb33