[8.6](backport #2411) Migrate docker provider to ECS fields: container.image -> container.image.name

[mergify]

This is an automatic backport of pull request #2411 done by Mergify.

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.com

[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: 2023-03-29T10:37:28.255+0000

• Duration: 17 min 40 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4931
Skipped	15
Total	4946

💚 Flaky test report

Tests succeeded.

🤖 GitHub comments

Expand to view the GitHub comments

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

• /test : Re-trigger the build.

• /package : Generate the packages.

• run integration tests : Run the Elastic Agent Integration tests.

• run end-to-end tests : Generate the packages and run the E2E Tests.

• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	98.333% (59/60)	👍
Files	69.565% (144/207)	👍
Classes	69.036% (272/394)	👍
Methods	53.752% (831/1546)	👍
Lines	39.045% (9146/23424)	👍 0.014
Conditionals	100.0% (0/0)	💚