Move OrderMap module to root of otel-api crate

[lalitb]

Fixes #
Design discussion issue (if applicable) #

Changes

OrderMap module is currently stored under crate::opentelemetry-api::trace hierarchy. Going ahead as part of #788, this data structure would also be used in logs bridge-api/sdk to log attributes. As this is a generic data structure, and doesn't logically belong to Trace, moving it to root of opentelemetry-api crate. This will enable it to used in both trace and logs in much cleaner way.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (ecf0dda) 54.9% compared to head (821ec85) 54.9%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1061   +/-   ##
=====================================
  Coverage   54.9%   54.9%           
=====================================
  Files        151     151           
  Lines      18242   18242           
=====================================
  Hits       10025   10025           
  Misses      8217    8217           

Impacted Files	Coverage Δ
opentelemetry-api/src/lib.rs	100.0% <ø> (ø)
opentelemetry-api/src/order_map.rs	4.2% <ø> (ø)
opentelemetry-api/src/trace/mod.rs	80.8% <ø> (ø)
opentelemetry-api/src/trace/tracer.rs	45.6% <ø> (ø)
opentelemetry-sdk/src/trace/sampler.rs	92.4% <ø> (ø)
...try-sdk/src/trace/sampler/jaeger_remote/sampler.rs	6.4% <ø> (ø)
opentelemetry-sdk/src/trace/tracer.rs	93.4% <ø> (ø)

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[TommyCpp]

Looks good, thanks. Could you add a CHANGELOG?

this may be breaking change for existing trace users as they have to change the specified path of this module in their code

One way to mitigate it is to re-export it in traces module

[lalitb]

Looks good, thanks. Could you add a CHANGELOG?
One way to mitigate it is to re-export it in traces module

Thanks, added changelog, and re-export in trace module.