Feature: Added BlobContainerClientProvider option to AzureBlobStorageCache and AzureBlobStorageImageProvider

[marklagendijk]

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

Implementation of https://github.com/SixLabors/ImageSharp.Web/discussions/360

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 85%. Comparing base (46068c2) to head (3bb469c). Report is 2 commits behind head on main.

Files	Patch %	Lines
...b.Providers.Azure/Caching/AzureBlobStorageCache.cs	75%	0 Missing and 1 partial :warning:
...s.Azure/Providers/AzureBlobStorageImageProvider.cs	83%	0 Missing and 1 partial :warning:

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #361   +/-   ##
===================================
- Coverage    85%    85%   -1%     
===================================
  Files        82     82           
  Lines      2343   2349    +6     
  Branches    350    352    +2     
===================================
+ Hits       2012   2016    +4     
  Misses      230    230           
- Partials    101    103    +2     

Flag	Coverage Δ
unittests	85% <83%> (-1%)	:arrow_down:

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