catch xray subsegment creation exceptions

[DylanLovesCoffee]

What does this PR do?

Wraps logic that creates the dummy dd Xray subsegment in a try...except and logs the error.

Motivation

Issue raised where xray can't create a segment in Govcloud at times. This leads to xray being unable to create a subsegment and the function fails trying to write metadata to a None object.

Testing Guidelines

Testing run automatically via github actions.

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)

[srosenthal-dd]

Thanks for the fix! It worked perfectly! 💻 🐶 ❤️