* Use gofumpt instead of gofmt in golangci-lint conf
* Run gofumpt fixes
* Format generated templates
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Co-authored-by: Chester Cheung <cheung.zhy.csu@gmail.com>
* Add internaltest templates
* Generate internaltest using gotmpl
* Generate the sdk/internal/internaltest pkg
* Use sdk/internal/internaltest in sdk module
* Generate exporters/jaeger/internal/internaltest pkg
* Use exporters/jaeger/internal/internaltest in jaeger exporter
* Generate the exporters/zipkin/internal/internaltest pkg
* Use local internaltest in zipkin exporter
* Fix import path name in trace test
* Deprecate oteltest.Harness for removal
* Add changes to changelog
* Alias oteltest.Harness to internaltest
* Update oteltest/tracer_test.go
remove `oteltest` import.
Co-authored-by: Anthony Mirabella <a9@aneurysm9.com>