Use ICU4X built-in data

[robertbastian]

The data that is currently being generated in parley_data is the same data that ICU4X ships with. However, using try_new_unstable constructors with custom data providers can be less efficient than enabling the compiled_data feature, as these constructors do runtime lookups and branching, whereas most compiled_data constructors are const.

This requires unicode-org/icu4x#7268.

Benchmarks look neutral:

Default Style - arabic 20 characters               [   9.9 us ...   9.7 us ]      -1.46%*
Default Style - latin 20 characters                [   4.5 us ...   4.3 us ]      -4.27%*
Default Style - japanese 20 characters             [   9.1 us ...   8.9 us ]      -2.30%*
Default Style - arabic 1 paragraph                 [  55.5 us ...  55.6 us ]      +0.13%
Default Style - latin 1 paragraph                  [  18.2 us ...  17.9 us ]      -1.49%*
Default Style - japanese 1 paragraph               [  76.8 us ...  76.9 us ]      +0.16%
Default Style - arabic 4 paragraph                 [ 234.0 us ... 235.1 us ]      +0.48%
Default Style - latin 4 paragraph                  [  69.0 us ...  68.2 us ]      -1.05%*
Default Style - japanese 4 paragraph               [ 131.9 us ... 136.0 us ]      +3.11%
Styled - arabic 20 characters                      [  11.3 us ...  11.3 us ]      -0.43%
Styled - latin 20 characters                       [   6.3 us ...   6.3 us ]      -0.99%
Styled - japanese 20 characters                    [   9.9 us ...   9.7 us ]      -1.80%*
Styled - arabic 1 paragraph                        [  59.4 us ...  58.5 us ]      -1.40%
Styled - latin 1 paragraph                         [  23.7 us ...  23.3 us ]      -1.82%*
Styled - japanese 1 paragraph                      [  86.6 us ...  87.5 us ]      +1.05%*
Styled - arabic 4 paragraph                        [ 251.7 us ... 252.5 us ]      +0.32%
Styled - latin 4 paragraph                         [  90.4 us ...  89.1 us ]      -1.45%*
Styled - japanese 4 paragraph                      [ 123.7 us ... 124.0 us ]      +0.24%