fix: support dynamic libdd_wrapper.so filename

[brettlangdon]

What does this PR do?

DataDog/dd-trace-py#10840 is changing the name of the libdd_wrapper.so file, we need to update this Dockerfile to support the change in the name.

Motivation

Without this change, after the release of DataDog/dd-trace-py#10840 the building of this Dockerfile will start to fail.

Testing Guidelines

This was caught in the serverless benchmark job failing with this change.

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)