* Deprecate Array attribute in favor of *Slice types
* Use new attr types in Jaeger exporter
* Use slice attr types in otlpmetric
* Use slice attr types in otlptrace
* Use slice attr types in zipkin exporter
* Remove array attr test from deprectated oteltest func
* Use StringSlice for cmd arg resource attr
* Add changes to the changelog
* Remove use of deprecated Array func
Group benchmarks by type for easier understanding and filtering.
Save output of function calls in benchmarks to file level vars to ensure
the compiler does not optimize away the test.
Unify testing functionality for common benchmark tasks.
