Add ArrayAccessor, Iterator, Extend and benches for string run builder

[askoa]

Which issue does this PR close?

Part of #3520

Rationale for this change

See issue description

What changes are included in this PR?

Built on top of yet to be merged (1/21/2023) PRs #3553 and #3534. Hence marking this PR draft.

• Implement Extend for the PrimitiveRunBuilder and GenericByteRunBuilder
• Add TypedRunArray
• Add RunArrayIter and ArrayAccessor for TypedRunArray
• Add benchmarks for StringRunBuilder

Are there any user-facing changes?

Users will get new features for RunArray.

No breaking changes.

[askoa]

Benchmark for building REE Array

Benchmarking string_ree_array_builder/(ree_array_len:20, logical_array_len:1000, string_len: 5): Collecting 100 samples in estimated 5.0191 s (192k iterati
string_ree_array_builder/(ree_array_len:20, logical_array_len:1000, string_len: 5)
                        time:   [22.523 µs 23.376 µs 24.348 µs]
Found 7 outliers among 100 measurements (7.00%)
  2 (2.00%) high mild
  5 (5.00%) high severe
Benchmarking string_ree_array_builder/(ree_array_len:100, logical_array_len:1000, string_len: 5): Collecting 100 samples in estimated 5.1036 s (167k iterat
string_ree_array_builder/(ree_array_len:100, logical_array_len:1000, string_len: 5)
                        time:   [28.168 µs 29.445 µs 31.107 µs]
Found 7 outliers among 100 measurements (7.00%)
  3 (3.00%) high mild
  4 (4.00%) high severe
Benchmarking string_ree_array_builder/(ree_array_len:100, logical_array_len:1000, string_len: 10): Collecting 100 samples in estimated 5.0983 s (212k itera
string_ree_array_builder/(ree_array_len:100, logical_array_len:1000, string_len: 10)
                        time:   [23.035 µs 23.994 µs 25.231 µs]
Found 8 outliers among 100 measurements (8.00%)
  2 (2.00%) high mild
  6 (6.00%) high severe
Benchmarking string_ree_array_builder/(ree_array_len:100, logical_array_len:10000, string_len: 10): Collecting 100 samples in estimated 5.4504 s (45k itera
string_ree_array_builder/(ree_array_len:100, logical_array_len:10000, string_len: 10)
                        time:   [118.89 µs 123.77 µs 130.04 µs]
Found 10 outliers among 100 measurements (10.00%)
  2 (2.00%) high mild
  8 (8.00%) high severe
Benchmarking string_ree_array_builder/(ree_array_len:100, logical_array_len:10000, string_len: 100): Collecting 100 samples in estimated 5.2981 s (15k iter
string_ree_array_builder/(ree_array_len:100, logical_array_len:10000, string_len: 100)
                        time:   [296.52 µs 310.34 µs 328.42 µs]
Found 17 outliers among 100 measurements (17.00%)
  8 (8.00%) high mild
  9 (9.00%) high severe

[askoa]

Will make a new PR.