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]

Codecov Report

Merging #540 (1ff2d9b) into main (5f795b8) will increase coverage by 0.47%.
The diff coverage is 69.69%.

@@             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     

Impacted Files	Coverage Δ
...c/main/java/net/datafaker/providers/base/Text.java	78.81% <69.69%> (+9.18%)	⬆️
...ain/java/net/datafaker/idnumbers/EnZAIdNumber.java	83.33% <0.00%> (-8.34%)	⬇️
...ker/idnumbers/pt/br/IdNumberGeneratorPtBrUtil.java	92.59% <0.00%> (-3.71%)	⬇️
.../java/net/datafaker/service/FakeValuesService.java	86.02% <0.00%> (-0.87%)	⬇️
...rc/main/java/net/datafaker/service/FakeValues.java	82.97% <0.00%> (+1.06%)	⬆️
.../datafaker/transformations/sql/SqlTransformer.java	88.14% <0.00%> (+1.11%)	⬆️
...java/net/datafaker/providers/base/DateAndTime.java	98.52% <0.00%> (+1.47%)	⬆️
.../main/java/net/datafaker/service/FakerContext.java	89.74% <0.00%> (+2.56%)	⬆️
...n/java/net/datafaker/providers/base/BaseFaker.java	93.90% <0.00%> (+4.87%)	⬆️
... and 4 more

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