Rentable BinaryStreamWriters that write to temporary MemoryStream

[Washi1337]

Adds MemoryStreamWriterPool class that allows for renting BinaryStreamWriter instances from a pool. This significantly reduces the amount of allocated writer objects, as well as backing buffers when serializing code streams and blob signatures.

[Washi1337]

Before (v4.11.0):

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
HelloWorld_Read	140.71 μs	0.921 μs	0.769 μs	5.3711	0.4883	-	44 KB
HelloWorld_ReadWrite	8,492.40 μs	167.951 μs	402.400 μs	-	-	-	12,955 KB
CrackMe_Read	29.95 μs	0.226 μs	0.188 μs	5.1270	0.4883	-	42 KB
CrackMe_ReadWrite	14,071.19 μs	269.914 μs	288.805 μs	984.3750	828.1250	484.3750	14,799 KB
ManyMethods_Read	141.28 μs	0.266 μs	0.222 μs	5.6152	0.7324	0.2441	44 KB
ManyMethods_ReadWrite	143,602.94 μs	2,869.350 μs	7,303.412 μs	7000.0000	3000.0000	1000.0000	72,342 KB
CoreLib_ReadWrite	1,224,662.14 μs	22,615.164 μs	21,154.239 μs	36000.0000	16000.0000	5000.0000	298,321 KB

After:

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
HelloWorld_Read	140.81 μs	0.946 μs	0.838 μs	5.3711	0.4883	-	44 KB
HelloWorld_ReadWrite	13,591.39 μs	271.370 μs	601.337 μs	1062.5000	890.6250	453.1250	12,946 KB
CrackMe_Read	30.64 μs	0.611 μs	1.117 μs	5.1270	0.5188	-	42 KB
CrackMe_ReadWrite	13,676.73 μs	232.188 μs	347.528 μs	984.3750	843.7500	484.3750	14,789 KB
ManyMethods_Read	140.71 μs	0.608 μs	0.539 μs	5.3711	0.4883	-	44 KB
ManyMethods_ReadWrite	136,717.57 μs	2,554.486 μs	2,389.468 μs	6000.0000	3000.0000	1000.0000	65,148 KB
CoreLib_ReadWrite	1,202,716.88 μs	23,903.364 μs	50,420.307 μs	31000.0000	15000.0000	5000.0000	255,962 KB