Preload classes and methods while parsing yaml

[snuyanzin]

This is a small optimization which allows to speed up a bit nested expressions e.g.

street_name:
        - "#{Name.first_name} #{street_suffix}"
        - "#{Name.last_name} #{street_suffix}"

before

Benchmark                              Mode  Cnt    Score   Error   Units
DatafakerSimpleMethods.streetAddress  thrpt   10  551.874 ± 7.358  ops/ms

after

DatafakerSimpleMethods.streetAddress  thrpt   10   682.915 ±  5.474  ops/ms

[codecov-commenter]

Codecov Report

Merging #597 (11d209f) into main (72b8d7e) will decrease coverage by 0.30%.
The diff coverage is 76.11%.

@@             Coverage Diff              @@
##               main     #597      +/-   ##
============================================
- Coverage     93.15%   92.85%   -0.31%     
- Complexity     2445     2463      +18     
============================================
  Files           252      252              
  Lines          5097     5148      +51     
  Branches        562      580      +18     
============================================
+ Hits           4748     4780      +32     
- Misses          211      220       +9     
- Partials        138      148      +10     

Impacted Files	Coverage Δ
.../java/net/datafaker/service/FakeValuesService.java	84.92% <71.42%> (-0.83%)	⬇️
...n/java/net/datafaker/providers/base/BaseFaker.java	87.82% <75.00%> (-6.23%)	⬇️
...rc/main/java/net/datafaker/service/FakeValues.java	83.19% <90.00%> (+0.15%)	⬆️
...ain/java/net/datafaker/idnumbers/EnZAIdNumber.java	83.33% <0.00%> (-8.34%)	⬇️
.../main/java/net/datafaker/service/FakerContext.java	92.30% <0.00%> (+2.56%)	⬆️

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