Add Status type to SDK

[MrAlias]

Instead of having two methods to return related information about the span status, use this new type to encapsulate the Span status similar to how the Event type encapsulates a Span event and the Link type encapsulates a span link.

Additionally, change the term status message to status description to match the language in the specification.

Part of the clean up included in #1873 for #1380.

[codecov]

Codecov Report

Merging #1874 (4f28bd0) into main (f90d0d9) will increase coverage by 0.0%.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #1874   +/-   ##
=====================================
  Coverage   78.7%   78.7%           
=====================================
  Files        137     137           
  Lines       7343    7339    -4     
=====================================
- Hits        5784    5781    -3     
  Misses      1317    1317           
+ Partials     242     241    -1     

Impacted Files	Coverage Δ
trace/trace.go	86.7% <ø> (ø)
exporters/otlp/internal/otlptest/data.go	87.7% <100.0%> (-0.3%)	⬇️
exporters/otlp/internal/transform/span.go	98.1% <100.0%> (ø)
exporters/trace/jaeger/jaeger.go	92.3% <100.0%> (-0.6%)	⬇️
exporters/trace/zipkin/model.go	99.1% <100.0%> (ø)
sdk/trace/span.go	93.9% <100.0%> (-0.1%)	⬇️
sdk/trace/batch_span_processor.go	87.1% <0.0%> (+1.5%)	⬆️