[API-2160] Add Nullable Support for Value Types on SQL Queries

[emreyigit]

If result of a SQL query contains null values, .Net client throws. See #854 for more details. This is because although SQL supports null for primitive types. The client cannot handle it. I've added nullable support for fixed sized type which are primitive ones.

Also, current implementation were failing while parsing null or mixed result due to wrong assumptions on List. Defining a size during initialization, does not mean that the list created with null values. This is fixed in the PR.

[netlify]

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[codecov-commenter]

Codecov Report

Attention: 1060 lines in your changes are missing coverage. Please review.

Comparison is base (7c75b2e) 84.87% compared to head (e6784f7) 80.76%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
src/Hazelcast.Net/Models/MapOptions.cs	31.69%	125 Missing ⚠️
src/Hazelcast.Net/Models/QueryCacheOptions.cs	34.83%	58 Missing ⚠️
src/Hazelcast.Net/Models/MapStoreOptions.cs	33.82%	45 Missing ⚠️
src/Hazelcast.Net/Models/RingbufferOptions.cs	35.71%	45 Missing ⚠️
...rotocol/Codecs/DynamicConfigAddCacheConfigCodec.cs	0.00%	40 Missing ⚠️
...cast.Net/Models/CacheSimpleEntryListenerOptions.cs	0.00%	29 Missing ⚠️
src/Hazelcast.Net/Models/Capacity.cs	10.00%	27 Missing ⚠️
src/Hazelcast.Net/Models/WanReplicationRef.cs	31.57%	26 Missing ⚠️
src/Hazelcast.Net/Models/RingbufferStoreOptions.cs	31.42%	24 Missing ⚠️
src/Hazelcast.Net/NearCaching/NearCacheOptions.cs	67.60%	23 Missing ⚠️
... and 42 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #872      +/-   ##
==========================================
- Coverage   84.87%   80.76%   -4.12%     
==========================================
  Files         941     1018      +77     
  Lines       22346    24496    +2150     
==========================================
+ Hits        18966    19783     +817     
- Misses       3380     4713    +1333     

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[zpqrtbnk]

Approved