MM-21898: Part 2. Add opentracing (#13904)

* initial implementation of opentracing

* app layer

* Revert Makefile

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* cleanup

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* [ci]

* autogenerate interface

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* missed vendor files

* updated interfaces

* updated store layers

* lint fixes

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* finishing layer generators and nested spans

* added errors and b3 support

* code review

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* fixed build error due to misplased flag.Parse()

* code review addressed

vendor/github.com/uber/jaeger-client-go/.gitmodules

@@ -0,0 +1,3 @@
+[submodule "idl"]
+	path = idl
+	url = https://github.com/uber/jaeger-idl.git