Remove nullable disable from azure

[stefannikolei]

Prerequisites

• [x] I have written a descriptive pull-request title
• [x] I have verified that there are no overlapping pull-requests open
• [x] I have verified that I am following matches the existing coding patterns and practice as demonstrated in the repository. These follow strict Stylecop rules :cop:.
• [x] I have provided test coverage for my change (where applicable)

Description

• Removed all Nullable disable from the azure providers
• Removed IAzureBlobContainerClientOptions because it wasn't used just for declaration
• Added convenience DI methods for Adding the cache or image provider. Leaving out the initialization was on purpose to not run that code on startup because it could throw an exception so the app won't start..

[codecov[bot]]

Codecov Report

Merging #309 (11cc34c) into main (e852621) will decrease coverage by 1%. The diff coverage is 42%.

:exclamation: Current head 11cc34c differs from pull request most recent head bae419e. Consider uploading reports for the commit bae419e to get more accurate results

@@         Coverage Diff         @@
##           main   #309   +/-   ##
===================================
- Coverage    85%    85%   -1%     
===================================
  Files        77     78    +1     
  Lines      2192   2199    +7     
  Branches    304    308    +4     
===================================
- Hits       1879   1877    -2     
- Misses      229    235    +6     
- Partials     84     87    +3     

Flag	Coverage Δ
unittests	85% <42%> (-1%)	:arrow_down:

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Impacted Files	Coverage Δ
...b.Providers.Azure/Caching/AzureBlobStorageCache.cs	100% <ø> (ø)
...s.Azure/Resolvers/AzureBlobStorageCacheResolver.cs	100% <ø> (ø)
....Web.Providers.Azure/SeviceCollectionExtensions.cs	0% <0%> (ø)
...s.Azure/Providers/AzureBlobStorageImageProvider.cs	65% <30%> (-12%)	:arrow_down:
...ders.Azure/Caching/AzureBlobStorageCacheOptions.cs	100% <100%> (ø)
.../Providers/AzureBlobStorageImageProviderOptions.cs	100% <100%> (ø)
...s.Azure/Resolvers/AzureBlobStorageImageResolver.cs	100% <100%> (ø)
.../Synchronization/RefCountedConcurrentDictionary.cs	72% <0%> (-4%)	:arrow_down:
...ching/LruCache/ConcurrentTLruCache{TKey,TValue}.cs	46% <0%> (+2%)	:arrow_up:

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