libdd-ddsketch: add method for constructing DDSketch from protobuf representation

[tobz]

What does this PR do?

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Motivation

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Additional Notes

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 98.26590% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.43%. Comparing base (e99f32f) to head (e154a0b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1435      +/-   ##
==========================================
+ Coverage   71.35%   71.43%   +0.07%     
==========================================
  Files         413      413              
  Lines       66152    66325     +173     
==========================================
+ Hits        47203    47376     +173     
  Misses      18949    18949              

Components	Coverage Δ
libdd-crashtracker	58.86% <ø> (-0.07%)	⬇️
libdd-crashtracker-ffi	16.38% <ø> (ø)
libdd-alloc	98.73% <ø> (ø)
libdd-data-pipeline	86.36% <ø> (ø)
libdd-data-pipeline-ffi	78.05% <ø> (ø)
libdd-common	81.11% <ø> (ø)
libdd-common-ffi	74.19% <ø> (ø)
libdd-telemetry	59.95% <ø> (ø)
libdd-telemetry-ffi	21.17% <ø> (ø)
libdd-dogstatsd-client	83.75% <ø> (ø)
datadog-ipc	82.61% <ø> (ø)
libdd-profiling	81.04% <ø> (ø)
libdd-profiling-ffi	62.43% <ø> (ø)
datadog-sidecar	36.29% <ø> (ø)
datdog-sidecar-ffi	12.95% <ø> (ø)
spawn-worker	55.18% <ø> (ø)
libdd-tinybytes	92.44% <ø> (ø)
libdd-trace-normalization	82.33% <ø> (ø)
libdd-trace-obfuscation	94.17% <ø> (ø)
libdd-trace-protobuf	61.18% <ø> (ø)
libdd-trace-utils	89.74% <ø> (ø)
datadog-tracer-flare	59.74% <ø> (ø)
libdd-log	75.57% <ø> (ø)

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