Convert non-string object types into string during ruleset parsing

[Anilm3]

This PR introduces a small change to convert string-compatible objects into string during the parsing stage. The yaml-to-object converter used for testing was also fixed to account for non-string types.

Note that parameter.{cpp,hpp} will be removed in v2.

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-04-23 15:28:17

Comparing candidate commit 4262d6a in PR branch anilm3/non-string-action-parameters with baseline commit f6ca86d in branch master.

Found 9 performance improvements and 1 performance regressions! Performance is the same for 9 metrics, 0 unstable metrics.

scenario:bool_equals_matcher.random

• 🟩 execution_time [-61.106µs; -59.908µs] or [-5.263%; -5.160%]

scenario:exact_match_matcher.random

• 🟩 execution_time [-64.070µs; -63.096µs] or [-4.241%; -4.176%]

scenario:float_equals_matcher.random

• 🟩 execution_time [-54.394µs; -53.579µs] or [-4.686%; -4.616%]

scenario:ip_match_matcher.random

• 🟩 execution_time [-47.099µs; -46.190µs] or [-3.141%; -3.080%]

scenario:phrase_match_matcher.enforce_word_boundary.random

• 🟥 execution_time [+2.433ms; +2.435ms] or [+41.053%; +41.085%]

scenario:phrase_match_matcher.random

• 🟩 execution_time [-237.684µs; -234.660µs] or [-3.711%; -3.664%]

scenario:regex_match_matcher.random

• 🟩 execution_time [-140.136µs; -139.206µs] or [-7.211%; -7.163%]

scenario:remove_nulls_transformer.random

• 🟩 execution_time [-1.265ms; -1.262ms] or [-11.867%; -11.846%]

scenario:signed_equals_matcher.random

• 🟩 execution_time [-56.231µs; -55.041µs] or [-4.850%; -4.747%]

scenario:string_equals_matcher.random

• 🟩 execution_time [-43.099µs; -42.054µs] or [-3.093%; -3.018%]