Allow customization of OTel span tags

[cretz]

Describe the solution you'd like

Go and Python and .NET and others use temporalWorkflowID, temporalRunID, temporalActivityID, etc but Java uses workflowId and runId Cannot change Java's defaults for compatibility reasons, but we should allow these to be customized so users can make them the same. Some SDKs like .NET already allow these to be customized.