SpanBuilder should not allow with_span_id and with_trace_id

[cijothomas]

https://github.com/open-telemetry/opentelemetry-rust/blob/main/opentelemetry/src/trace/tracer.rs#L242
with_trace_id, with_span_id allow one to specify TraceId,SpanId via builder - there is no such capability in the specification.
If user want to control traceid,spanid generation, they can use IdGenerator.

This must be removed from SpanBuilder

[Shunpoco]

@cijothomas I'd like to take this issue (and perhaps similar issues you put above).
Do I need to do anything other than just removing those methods from SpanBuilder?
It looks that there is no place which uses them in this repository.

[cijothomas]

This may have same dependency breaking issue as #2753 (comment)

If tracing-opentelemetry is not dependent on this, then we can remove it right away.