Engine update batcher

[Anilm3]

Description

• Shift remote_config::listener ownership from remote_config::product to remote_config::client
• Allow a remote_config::listener to handle multiple products
• Perform init / commit before assigning configurations in remote_config::product
• Introduce remote_config::engine_listener which handles all engine updates in a single listener
• Replace remote_config::asm_listener, remote_config::asm_dd_listener, remote_config::asm_data_listener with similar config aggregators

Motivation

Additional Notes

Describe how to test your changes

Readiness checklist

• Unit tests have been updated and pass
• If known, an appropriate milestone has been selected
• All new source files include the required notice

Release checklist

• The CHANGELOG.md has been updated

[codecov-commenter]

Codecov Report

Merging #248 (9f2d9e8) into master (3ad61e0) will decrease coverage by 10.38%.
The diff coverage is 57.32%.

@@             Coverage Diff             @@
##           master     #248       +/-   ##
===========================================
- Coverage   63.68%   53.31%   -10.38%     
===========================================
  Files          90       69       -21     
  Lines        5606     2401     -3205     
  Branches     1776     1076      -700     
===========================================
- Hits         3570     1280     -2290     
+ Misses        971      423      -548     
+ Partials     1065      698      -367     

Flag	Coverage Δ
extension	?
helper	53.31% <57.32%> (-0.22%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/helper/json_helper.hpp	83.33% <ø> (ø)
src/helper/remote_config/client.hpp	100.00% <ø> (ø)
.../remote_config/listeners/asm_features_listener.cpp	58.33% <ø> (ø)
src/helper/remote_config/product.cpp	52.50% <ø> (+2.50%)	⬆️
src/helper/utils.hpp	83.33% <ø> (ø)
src/helper/utils.cpp	29.41% <29.41%> (ø)
src/helper/remote_config/client_handler.cpp	73.97% <42.85%> (+3.45%)	⬆️
...listeners/config_aggregators/asm_dd_aggregator.cpp	46.15% <46.15%> (ø)
src/helper/remote_config/client.cpp	51.06% <50.00%> (-0.05%)	⬇️
.../remote_config/listeners/asm_features_listener.hpp	66.66% <50.00%> (ø)
... and 13 more

... and 28 files with indirect coverage changes

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