Additional reflection invoke benchmarks

[steveharter]

Add benchmarks for the MethodInvoker and ConstructorInvoker classes and for an additional case of re-invoking the constructor on an existing object.

These will help verify upcoming changes with startup performance optimizations.

FWIW here's my local results

Method	Mean	Error	StdDev	Median	Min	Max	Gen0	Allocated
Method0_NoParms	9.256 ns	0.2306 ns	0.2467 ns	9.321 ns	8.936 ns	9.687 ns	-	-
Method0_NoParms_MethodInvoker	5.086 ns	0.0845 ns	0.0790 ns	5.086 ns	4.974 ns	5.210 ns	-	-
StaticMethod4_arrayNotCached_int_string_struct_class	36.719 ns	0.8800 ns	0.9416 ns	36.756 ns	35.018 ns	38.944 ns	0.0099	104 B
StaticMethod5_arrayNotCached_int_string_struct_class_bool	53.684 ns	1.7858 ns	1.9108 ns	53.373 ns	51.268 ns	58.168 ns	0.0128	136 B
StaticMethod4_int_string_struct_class	27.268 ns	0.2212 ns	0.1961 ns	27.250 ns	26.996 ns	27.705 ns	-	-
StaticMethod4_int_string_struct_class_MethodInvoker	11.969 ns	0.1103 ns	0.1032 ns	11.948 ns	11.818 ns	12.189 ns	-	-
StaticMethod4_int_string_struct_class_MethodInvokerWithSpan	13.495 ns	0.2373 ns	0.2220 ns	13.476 ns	13.170 ns	13.917 ns	-	-
StaticMethod4_ByRefParams_int_string_struct_class	109.117 ns	1.5282 ns	1.4295 ns	108.865 ns	107.082 ns	112.330 ns	0.0043	48 B
StaticMethod4_ByRefParams_int_string_struct_class_MethodInvoker	89.722 ns	2.2954 ns	2.6434 ns	89.848 ns	85.623 ns	95.046 ns	0.0045	48 B
StaticMethod5_ByRefParams_int_string_struct_class_bool	146.748 ns	2.9333 ns	3.2604 ns	145.738 ns	143.107 ns	153.888 ns	0.0069	72 B
Ctor0_NoParams	11.067 ns	1.8132 ns	2.0154 ns	10.683 ns	8.790 ns	14.236 ns	0.0061	64 B
Ctor0_NoParams_ConstructorInvoker	7.392 ns	0.3309 ns	0.3810 ns	7.311 ns	6.822 ns	8.014 ns	0.0061	64 B
Ctor0_NoParams_Reinvoke	36.917 ns	0.3275 ns	0.2903 ns	36.811 ns	36.529 ns	37.523 ns	-	-
Ctor0_ActivatorCreateInstance_NoParams	6.424 ns	0.1279 ns	0.1422 ns	6.430 ns	6.182 ns	6.656 ns	0.0061	64 B
Ctor4_int_string_struct_class	29.025 ns	0.3752 ns	0.3509 ns	28.938 ns	28.516 ns	29.798 ns	0.0061	64 B
Ctor4_int_string_struct_class_ConstructorInvoker	15.152 ns	0.2552 ns	0.2262 ns	15.198 ns	14.776 ns	15.476 ns	0.0061	64 B
Ctor4_ActivatorCreateInstance	253.183 ns	2.7633 ns	2.3075 ns	252.531 ns	249.825 ns	257.579 ns	0.0403	432 B
Property_Get_int	13.426 ns	0.5590 ns	0.6437 ns	13.143 ns	12.658 ns	14.572 ns	0.0023	24 B
Property_Get_class	9.814 ns	0.1697 ns	0.1588 ns	9.786 ns	9.610 ns	10.099 ns	-	-
Property_Set_int	16.034 ns	0.6744 ns	0.7495 ns	15.819 ns	15.254 ns	17.719 ns	0.0023	24 B
Property_Set_class	11.953 ns	0.1426 ns	0.1334 ns	11.979 ns	11.715 ns	12.144 ns	-	-
Field_Get_int	29.956 ns	0.5819 ns	0.5715 ns	29.757 ns	29.286 ns	31.119 ns	0.0022	24 B
Field_GetStatic_int	25.167 ns	0.2868 ns	0.2542 ns	25.096 ns	24.840 ns	25.739 ns	0.0022	24 B
Field_Get_class	3.576 ns	0.0451 ns	0.0377 ns	3.562 ns	3.539 ns	3.658 ns	-	-
Field_GetStatic_class	2.521 ns	0.0228 ns	0.0214 ns	2.521 ns	2.496 ns	2.564 ns	-	-
Field_Get_struct	27.129 ns	0.3876 ns	0.3626 ns	26.995 ns	26.675 ns	27.800 ns	0.0022	24 B
Field_GetStatic_struct	26.800 ns	0.3545 ns	0.3316 ns	26.802 ns	26.309 ns	27.457 ns	0.0022	24 B
Field_Set_int	8.713 ns	0.2312 ns	0.2662 ns	8.653 ns	8.380 ns	9.198 ns	0.0023	24 B
Field_SetStatic_int	7.650 ns	0.3617 ns	0.4020 ns	7.482 ns	7.145 ns	8.513 ns	0.0023	24 B
Field_Set_class	16.352 ns	0.3568 ns	0.3966 ns	16.211 ns	15.759 ns	17.135 ns	0.0023	24 B
Field_SetStatic_class	15.078 ns	0.2764 ns	0.2586 ns	15.069 ns	14.591 ns	15.525 ns	0.0022	24 B
Field_Set_struct	34.790 ns	0.2475 ns	0.2194 ns	34.720 ns	34.551 ns	35.314 ns	0.0023	24 B