feat: Add possibility to configure key prefix and expiration time from env (Redis, MemCached)

[AJIOB]

• Unifying the way for parsing all ..._KEY_PREFIX variables from env
• Add the way for reading numbers from env

[AJIOB]

Hi @Xuanwo,

Looks like we have some test data races or the compiler bug, isn't it?

Let's try to restart the failed build.

[codecov-commenter]

Codecov Report

Attention: 34 lines in your changes are missing coverage. Please review.

Comparison is base (7248d18) 30.77% compared to head (b0332ca) 30.83%.

Files	Patch %	Lines
src/config.rs	8.10%	25 Missing and 9 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2094      +/-   ##
==========================================
+ Coverage   30.77%   30.83%   +0.06%     
==========================================
  Files          52       52              
  Lines       19944    19940       -4     
  Branches     9658     9654       -4     
==========================================
+ Hits         6137     6148      +11     
+ Misses       7942     7938       -4     
+ Partials     5865     5854      -11     

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[Xuanwo]

Thanks!

[AJIOB]

@Xuanwo , let's merge it?