Add flag to enable time series data streams

[jsoriano]

What does this PR do?

Add a new setting to configure index mode for a data stream.

It is added as a new setting, instead of using elasticsearch.index_template, because it needs to be installed in the composable index template, and the other settings are installed in the @package component template. This was tried in elastic/integrations#3119.

Why is it important?

To allow to enable time series mode in data streams (https://www.elastic.co/guide/en/elasticsearch/reference/master/tsds.html#time-series-mode).

Checklist

• I have added test packages to test/packages that prove my change is effective.
• I have added an entry in versions/N/changelog.yml.

Related issues

• Closes Support for TSDB in package spec #311

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2022-06-21T10:35:34.081+0000

• Duration: 2 min 23 sec

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[joshdover]

@kpollich do we need a PR or issue tracking the change in Kibana for this?

[kpollich]

@joshdover We have elastic/kibana#132818 that includes TSDB, but it might make sense to separate this out into separate implementation issues?