Prefer `grep` and `grep_v` to `select`/`reject` that does a regexp match (Ruby 3+)

[dvandersluis]

Reference: rubocop/rubocop#8327 and rubocop/rubocop#10082

The follow pairs have equivalent behaviour:

array.select { |x| x.match?(REGEXP) }
array.grep(REGEXP)

array.reject { |x| x.match?(REGEXP) }
array.grep_v(REGEXP)

Previous to ruby 3, grep/grep_v had worse performance, but this was fixed by https://bugs.ruby-lang.org/issues/17030, so as of ruby 3, grep could be prefered as it is simpler.