Support opencensus.io/trace Spans too

[jjti]

Describe the solution you'd like
For repos not migrated to OTEL, this linter should also work with the older opencensus spans.

I think it's easy, adding another possible package here (that should be enabled by default):

go-spancheck/spancheck.go

Line 203 in 54ed04d

return ok && obj.Pkg().Path() == "go.opentelemetry.io/otel/trace"

But RecordError does not exist for this type of spans, so we'll want to ignore those in all checks

End() and SetStatus() should be equivalent to otel. RecordError does not exist so should be ignored.

Additional context

https://pkg.go.dev/go.opencensus.io/trace#Span

[jjti]

done on v0.5.0