Migrate valueType from telemetry to telemetryDefs

[kevinthegreat1]

Could be done with #72.

[kevinthegreat1]

Currently:

• eventDefs:
  • formatString is null
  • args is array of the names of the args
• events:
  • message is formatted message with args
  • args is array or args

[kevinthegreat1]

This has a problem: json object data can have different value type depending on the key but have the same telemetryDef.