Small performance improvements to %s formatted strings.

[purple4reina]

What does this PR do?

Replace all uses of % string interpolation.

Motivation

$ python -m timeit -s 'import logging ; logger = logging.getLogger(__name__) ; world = "world"' 'logger.debug("hello %s", world)'
5000000 loops, best of 5: 78 nsec per loop
$ python -m timeit -s 'import logging ; logger = logging.getLogger(__name__) ; world = "world"' 'logger.debug(f"hello {world}")'
5000000 loops, best of 5: 97.8 nsec per loop

If the log level is set higher than the log message being produced, it is actually faster to use a %s type string than an f string.

Testing Guidelines

Additional Notes

Types of Changes

• Bug fix
• New feature
• Breaking change
• Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• This PR's description is comprehensive
• This PR contains breaking changes that are documented in the description
• This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• This PR impacts documentation, and it has been updated (or a ticket has been logged)
• This PR's changes are covered by the automated tests
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• This PR passes the integration tests (ask a Datadog member to run the tests)

[duncanista]

LGTM – let's run the linter and then merge!