[Feature #19787] Add Enumerable#uniq_map, Enumerable::Lazy#uniq_map, Array#uniq_map and Array#uniq_map!

[joshuay03]

Implements https://bugs.ruby-lang.org/issues/19787

Benchmarks

Enumerable

./build/ruby: ruby 3.4.0dev (2024-03-16T01:29:18Z feature/#uniq_map 3580e39ed3) [arm64-darwin23]
warming up..
# Iteration per second (i/s)

|                    |./build/ruby|
|:-------------------|-----------:|
|e.map { ... }.uniq  |    145.732k|
|e.uniq_map { ... }  |    190.970k|

Array

./build/ruby: ruby 3.4.0dev (2024-03-16T01:29:18Z feature/#uniq_map 3580e39ed3) [arm64-darwin23]
warming up....
# Iteration per second (i/s)

|                      |./build/ruby|
|:---------------------|-----------:|
|a.map { ... }.uniq    |    202.570k|
|a.uniq_map { ... }    |    242.139k|
|a.map! { ... }.uniq!  |    110.230k|
|a.uniq_map! { ... }   |    111.476k|