Disable TestParsersMultilineMaxBytes

[michalpristas]

What does this PR do?

Disabling flaky test
Issue reported: #28088

Why is it important?

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

cc @kvch I assigned reported issue to you

[elasticmachine]

Pinging @elastic/agent (Team:Agent)

[mergify]

This pull request does not have a backport label. Could you fix it @michalpristas? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v./d./d./d is the label to automatically backport to the 7./d branch. /d is the digit

NOTE: backport-skip has been added to this pull request.

[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: 2021-09-23T07:40:28.959+0000

• Duration: 93 min 32 sec

• Commit: 08dddac

Test stats 🧪

Test	Results
Failed	0
Passed	15301
Skipped	2318
Total	17619

💚 Flaky test report

Tests succeeded.

Expand to view the summary

Test stats 🧪

Test	Results
Failed	0
Passed	15301
Skipped	2318
Total	17619

🤖 GitHub comments

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

• /test

• jenkins run the tests