Feature: optional using of backtrace instruments

[xDimon]

Signed-off-by: Dmitriy Khaustov aka xDimon khaustov.dm@gmail.com

Referenced issues

None

Description of the Change

Backward library is made optional

Benefits

It provides ability to switch of this instrument

[codecov]

Codecov Report

Merging #1382 (ea2f7a0) into master (10b8811) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head ea2f7a0 differs from pull request most recent head f68371e. Consider uploading reports for the commit f68371e to get more accurate results

@@            Coverage Diff             @@
##           master    #1382      +/-   ##
==========================================
- Coverage   24.60%   24.58%   -0.03%     
==========================================
  Files         629      629              
  Lines       23613    23613              
  Branches    12288    12288              
==========================================
- Hits         5811     5806       -5     
- Misses      12530    12540      +10     
+ Partials     5272     5267       -5     

Impacted Files	Coverage Δ
core/utils/kagome_db_editor.cpp	0.00% <ø> (ø)
node/main.cpp	0.00% <ø> (ø)
core/metrics/impl/session_impl.cpp	37.50% <0.00%> (-8.34%)	⬇️
core/metrics/impl/prometheus/handler_impl.cpp	26.53% <0.00%> (-2.05%)	⬇️

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