[ruby-core:106110] [Ruby master Feature#18344] Improve performance Kernel#Float with using Primitive.mandatory_only? method

Issue #18344 has been reported by S_H_ (Shun Hiraoka).

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Feature #18344: Improve performance Kernel#Float with using Primitive.mandatory_only? method
https://bugs.ruby-lang.org/issues/18344

* Author: S_H_ (Shun Hiraoka)
* Status: Open
* Priority: Normal
----------------------------------------
Recently, introduce `Primitive.mandatory_only?` method(to improve performance Time.at methods).
And, I tried to if can improve `Kernel#Float` method perfomance  with using `Primitive.mandatory_only?` method.

benchmark:
```yml
benchmark:
  float: "Float(42)"
  float_true: "Float(42, exception: true)"
  float_false: "Float(42, exception: false)"
loop_count: 10000

```

result:
```
sh@DESKTOP-L0NI312:~/rubydev/build$ make benchmark/kernel_float.yml -e COMPARE_RUBY=~/.rbenv/shims/ruby -e BENCH_RUBY=../install/bin/ruby -e BENCH_OPTS=--repeat-count=4
generating vm_call_iseq_optimized.inc
vm_call_iseq_optimized.inc unchanged
Calculating -------------------------------------
                     compare-ruby  built-ruby
               float      41.000M     47.416M i/s -     10.000k times in 0.000244s 0.000211s
          float_true      10.875M     21.317M i/s -     10.000k times in 0.000920s 0.000469s
         float_false      13.910M     22.847M i/s -     10.000k times in 0.000719s 0.000438s

Comparison:
                            float
          built-ruby:  47415837.0 i/s
        compare-ruby:  41000410.0 i/s - 1.16x  slower

                       float_true
          built-ruby:  21317416.4 i/s
        compare-ruby:  10875475.8 i/s - 1.96x  slower

                      float_false
          built-ruby:  22846698.6 i/s
        compare-ruby:  13910140.5 i/s - 1.64x  slower
```

`COMPARE_RUBY` is `ruby 3.1.0dev (2021-11-17T13:21:42Z master b95d7d2099) [x86_64-linux]`. BENCH_RUBY is ahead of `ruby 3.1.0dev (2021-11-17T13:21:42Z master b95d7d2099) [x86_64-linux]`.



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