[feature] #3015: Support for niche optimization in FFI

[mversic]

Description

Linked issue

Closes #3015

Benefits

Checklist

• I've read CONTRIBUTING.md
• I've used the standard signed-off commit format (or will squash just before merging)
• All applicable CI checks pass (or I promised to make them pass later)
• (optional) I've written unit tests for the code changes
• I replied to all comments after code review, marking all implemented changes with thumbs up

[codecov]

Codecov Report

Merging #3336 (9744f20) into iroha2-dev (a4d5c9f) will decrease coverage by 7.18%.
The diff coverage is 45.03%.

@@              Coverage Diff               @@
##           iroha2-dev    #3336      +/-   ##
==============================================
- Coverage       62.33%   55.16%   -7.18%     
==============================================
  Files             169      156      -13     
  Lines           31218    30204    -1014     
==============================================
- Hits            19459    16661    -2798     
- Misses          11759    13543    +1784     

Impacted Files	Coverage Δ
cli/src/lib.rs	0.28% <0.00%> (-69.16%)	⬇️
cli/src/main.rs	0.85% <0.00%> (-0.25%)	⬇️
cli/src/samples.rs	0.00% <0.00%> (-61.85%)	⬇️
cli/src/torii/mod.rs	0.00% <0.00%> (-27.66%)	⬇️
cli/src/torii/routing.rs	0.00% <0.00%> (-57.11%)	⬇️
cli/src/torii/utils.rs	0.00% <0.00%> (-84.85%)	⬇️
client/src/http_default.rs	0.00% <0.00%> (-38.94%)	⬇️
client_cli/src/main.rs	0.25% <0.00%> (+<0.01%)	⬆️
config/base/src/lib.rs	91.57% <ø> (+55.21%)	⬆️
config/src/lib.rs	33.33% <ø> (ø)
... and 103 more

... and 43 files with indirect coverage changes

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