fix: block forbidden chars from metric names

[dotkas]

What does this PR do?

Block calling metric functions with names that will cause datadog-agent to fail.

Motivation

I should probably have known better, but it took me a merged PR all the way to prod and an error message in DataDog Serverless before I realized my code didn't work, and a clone of datadog-agent Go code to realize what I'd messed up. So I figured this could help other people.

Testing Guidelines

I added a new Jest case.

Additional Notes

I guess this is technically a breaking change. But if anybody would be affected by it we'd really be doing them a favor here as they would still have errors in their logs, only further down the pipeline. 🤷🏻

Types of Changes

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

Check all that apply

• [x] 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)
• [x] 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)

[dotkas]