[7.11] Switch to JSON logging by default (#4590)

[simitt]

Backports the following commits to 7.11:

• Switch to JSON logging by default (Switch to JSON logging by default #4590)

[apmmachine]

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• Build Cause: Pull request #4605 opened

• Start Time: 2021-01-11T13:09:24.108+0000

• Duration: 51 min 33 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4510
Skipped	126
Total	4636

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• Description: tar --exclude=coverage-files.tgz -czf coverage-files.tgz coverage

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• Description: tar --exclude=system-tests-linux-files.tgz -czf system-tests-linux-files.tgz system-tests