Use Dictionary to resolve type accessors

[SergeiPavlov]

Unexpectedly FrozenDictionary is slower

The Benchmark (https://github.com/servicetitan/playground/blob/master/Benchmarks/TypeDictionary/TypeDictionary.cs ):

Method	Mean	Error	StdDev	Median
ResolveByReferenceEquals	42.76 ns	0.948 ns	2.579 ns	42.47 ns
Dictionary	33.75 ns	0.948 ns	2.531 ns	32.63 ns
FrozenDictionary	59.09 ns	1.174 ns	2.967 ns	58.82 ns