OpenTelemetry: support browser mode

[sheremet-va]

Clear and concise description of the problem

Test runner inside the browser mode doesn't support traces at the moment, but traces in the main thread are working correctly.

Suggested solution

Figure out how we can enable tracing in the browser mode.

Alternative

No response

Additional context

The main issue here is how to initialize a separate from Node SDK, since the API itself is environment agnostic. A separate browser-only sdkPath? Should we always require a separate project for browsers? sdkPath can already be specified in a project config. Maybe this is mostly a documentation issue.

Validations

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• Read the Contributing Guidelines.
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