Do not merge -- infinite tracing compression and batching

[jtduffy]

Do not merge
Original PR: #1146

Overview

This PR adds support for Infinite Tracing payloads to be both compressed and batched by default. The following changes are included as part of this work:

• Implements support for compressing infinite tracing payloads
• gzip compression is enabled by default for batching and non-batching configurations
• Implements support for batching spans within infinite tracing payloads
• Defaults for batching are:
  • Batching enabled by default
  • Up to 100 spans bundled per batch
  • Waiting (linger) for up to 5s to fill up the batch before sending

The span data is still streaming over HTTP/2 using gRPC but utilizing compression and batching will significantly reduce payload sizes and bytes over the wire, resulting in significantly lower network transfer costs for customers.

Testing

All new functionality has been covered with unit tests where possible.

Checks

• Are your contributions backwards compatible with relevant frameworks and APIs?

  • Yes

• Does your code contain any breaking changes?

  • No (although infinite tracing defaults are changing)

• Does your code introduce any new dependencies?

  • Only a testImplementation dependency for parameterized tests

[codecov-commenter]

Codecov Report

Merging #1266 (9306b1c) into main (9510e22) will increase coverage by 0.02%.
The diff coverage is 85.36%.

@@             Coverage Diff              @@
##               main    #1266      +/-   ##
============================================
+ Coverage     57.95%   57.98%   +0.02%     
- Complexity     8525     8544      +19     
============================================
  Files           943      945       +2     
  Lines         42264    42335      +71     
  Branches       6150     6157       +7     
============================================
+ Hits          24496    24547      +51     
- Misses        15357    15373      +16     
- Partials       2411     2415       +4     

Impacted Files	Coverage Δ
...ng/src/main/java/com/newrelic/InfiniteTracing.java	66.66% <0.00%> (-2.90%)	⬇️
...ing/src/main/java/com/newrelic/ChannelManager.java	61.38% <50.00%> (-2.45%)	⬇️
...ng/src/main/java/com/newrelic/SpanEventSender.java	90.14% <88.57%> (-2.72%)	⬇️
.../main/java/com/newrelic/InfiniteTracingConfig.java	55.55% <100.00%> (+9.60%)	⬆️
.../src/main/java/com/newrelic/SpanBatchObserver.java	100.00% <100.00%> (ø)
...cing/src/main/java/com/newrelic/SpanConverter.java	85.71% <100.00%> (+1.71%)	⬆️
...acing/src/main/java/com/newrelic/SpanObserver.java	100.00% <100.00%> (ø)
...wrelic/agent/config/InfiniteTracingConfigImpl.java	88.00% <100.00%> (+1.04%)	⬆️
...com/newrelic/agent/service/ServiceManagerImpl.java	77.97% <100.00%> (+0.16%)	⬆️

... and 4 files with indirect coverage changes

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