Instantiate XRay Remote Sampler with OTel Resource

[jj22ee]

To be consistent across the OTel SDK XRay samplers, the service name and cloud platform fields of the Remote Sampler should be able to be retrieved from a Resource. Currently, These fields are only configurable through the Remote Sampler constructor.

Context of Issue:
The resource of the TracerProvider is not available to the sampler (GH Issue), and it does not look like it will be anytime soon. As an alternative, the resource should be able to be passed into the sampler instantiation.

[codecov]

Codecov Report

Merging #3680 (6a768ad) into main (3061fc5) will increase coverage by 0.3%.
The diff coverage is 81.8%.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #3680     +/-   ##
=======================================
+ Coverage   79.2%   79.5%   +0.3%     
=======================================
  Files        165     165             
  Lines      10318   10351     +33     
=======================================
+ Hits        8173    8233     +60     
+ Misses      2008    1977     -31     
- Partials     137     141      +4     

Files Changed	Coverage Δ
samplers/aws/xray/remote_sampler.go	37.0% <81.8%> (+34.8%)	⬆️

... and 2 files with indirect coverage changes