What does this PR do?

Avoid ddtrace versions 4.6.*

Motivation

ddtrace==4.6.0 introduced a binary size regression that exceeds the allowable threshold for the lambda layer.

This should hopefully help resolve any CI or release related issues associated with the bloated 4.6.0 release.

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
• This PR collects user input/sensitive content into Datadog
• This PR passes the integration tests (ask a Datadog member to run the tests)