JaCraig / FastActivator / 24967141565

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feat(benchmarks): add cache strategy and dictionary key comparison benchmarks

This commit introduces new benchmark tests to evaluate the performance of various caching strategies and dictionary key lookups. The tests are designed to measure the efficiency of different approaches in handling type-based caching and dictionary access patterns.

- Added `CandidateCacheStrategyLongRunComparisons` to benchmark multiple caching strategies with hot and cold paths.
- Introduced `DictionaryKeyComparisons` to compare performance between hash code lookups and type lookups in dictionaries.
- Implemented `ConstructorCache` for thread-safe, striped caching of constructor information organized by type.
- Enhanced existing caching mechanisms with concurrent and striped locking to reduce contention.

Co-authored-by: Copilot <copilot@github.com>

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