Client-side cache related naming changes

[sazzad16]

Changes:

1. ClientSideCache and CommandLongHashing are good enough names on their own. But, IMO, these should have similar naming pattern; e.g. (Cache, Hash) or (Caching, Hashing). I opted for earlier option ATM.
   CommandLongHashing is renamed to CommandLongHasher.
2. Expanded the names of GuavaCSC (GuavaClientSideCache) and CaffeineCSC (CaffeineClientSideCache).

Note for reviewers: Check #3757 to see how client-side cache support currently looks and to find other changes to suggest.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 67.85714% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 75.22%. Comparing base (c02e5be) to head (4b82cae).

❗ Current head 4b82cae differs from pull request most recent head e5a7659. Consider uploading reports for the commit e5a7659 to get more accurate results

Files	Patch %	Lines
.../redis/clients/jedis/csc/GuavaClientSideCache.java	54.54%	4 Missing and 1 partial ⚠️
...dis/clients/jedis/csc/CaffeineClientSideCache.java	71.42%	1 Missing and 1 partial ⚠️
.../java/redis/clients/jedis/util/JedisURIHelper.java	0.00%	2 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@             Coverage Diff              @@
##              5.2.0    #3758      +/-   ##
============================================
+ Coverage     75.21%   75.22%   +0.01%     
- Complexity     5024     5028       +4     
============================================
  Files           309      309              
  Lines         15400    15399       -1     
  Branches       1171     1171              
============================================
+ Hits          11583    11584       +1     
- Misses         3297     3299       +2     
+ Partials        520      516       -4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.