Support OTel Resource via config within SpanExporter adapter

[HaloFour]

Adds support for resource configuration in adapter for OTel SpanExporters. Lightbend Config supports environment variable substitution out of the box:

handling = {
  async = true
  handlers = [
    {
      class = "com.comcast.money.otel.handlers.jaeger.JaegerOtelSpanHandler"
      resource = {
        deployment.environment = ${?XVP_ENV}
        cloud.region = ${?AWS_REGION}
      }
      batch = true
      exporter-timeout-ms = 30000
      max-batch-size = 512
      max-queue-size = 2048
      schedule-delay-ms = 5000
      exporter {
        endpoint = "localhost:14250"
        timeout-ms = 1000
      }
    }
  ]
}

[codecov-commenter]

Codecov Report

Merging #197 (6611a00) into master (37e1225) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #197      +/-   ##
==========================================
+ Coverage   93.96%   94.02%   +0.06%     
==========================================
  Files          94       94              
  Lines        1260     1273      +13     
  Branches       68       72       +4     
==========================================
+ Hits         1184     1197      +13     
  Misses         76       76              

Files Changed	Coverage Δ
...st/money/otel/handlers/MoneyReadableSpanData.scala	96.77% <100.00%> (+0.22%)	⬆️
.../comcast/money/otel/handlers/OtelSpanHandler.scala	100.00% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more