#1343 simplify code for returning all available locales

[asolntsev]

Now we don't scan classpath at all, but just return a hardcoded list of locales. Instead, we now have a unit-test that verifies that this list is up-to-date.

Related to:

• Faker().locality().allSupportedLocales() returns empty when Datafaker is embedded in Spring Boot Uber JAR #1343
• #1343 search locales in all JAR files, not only in "datafaker*.jar" #1349

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.42%. Comparing base (3e43689) to head (8d0424a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...in/java/net/datafaker/providers/base/Locality.java	88.88%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1350      +/-   ##
============================================
+ Coverage     92.23%   92.42%   +0.18%     
+ Complexity     3148     3142       -6     
============================================
  Files           318      318              
  Lines          6195     6162      -33     
  Branches        612      604       -8     
============================================
- Hits           5714     5695      -19     
+ Misses          332      325       -7     
+ Partials        149      142       -7     

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[kingthorin]

LGTM