Speed up text generation by removal map

[snuyanzin]

The result of measurement
before

Benchmark           Mode  Cnt     Score     Error   Units
Text.password10   thrpt   10  3324.275 ± 207.978  ops/ms
Text.password100  thrpt   10   953.392 ±   7.367  ops/ms

after

Benchmark           Mode  Cnt     Score     Error   Units
Text.password10   thrpt   10  9167.557 ± 195.276  ops/ms
Text.password100  thrpt   10  1722.053 ±  87.599  ops/ms

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 69.69697% with 10 lines in your changes missing coverage. Please review.

Project coverage is 92.42%. Comparing base (5f795b8) to head (1ff2d9b).
Report is 1209 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/main/java/net/datafaker/providers/base/Text.java	69.69%	9 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##               main     #540      +/-   ##
============================================
+ Coverage     91.94%   92.42%   +0.47%     
- Complexity     2360     2362       +2     
============================================
  Files           247      247              
  Lines          4953     4936      -17     
  Branches        530      528       -2     
============================================
+ Hits           4554     4562       +8     
+ Misses          268      246      -22     
+ Partials        131      128       -3     

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