LoggingOutputStreamTests failing on Windows

[mark-vieira]

Some recent changes were made to LoggingOutputStream in #51779 which might be responsible for these failures:

https://gradle-enterprise.elastic.co/s/vokapgu3ogfry/tests/failed

[elasticmachine]

Pinging @elastic/es-core-infra (:Core/Infra/Logging)

[mark-vieira]

@rjernst I'm assigning this to you for now.

[ywelsch]

I'm muting the tests in #51917

[davidkyle]

Reopening as there were 3 recent failures all based on commit 0b493e5 which comes after the fix in 88cf8ac

https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-windows-compatibility/os=windows-2016/439/console
https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-windows-compatibility/os=windows-2012-r2/439/console
https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-windows-compatibility/os=windows-2019/439/console

Looks like LoggingOutputStreamTests.testMaxBuffer also needs the \r fix.