YJIT: Optimize Integer#succ

[k0kubun]

We use Integer#succ when we rewrite loop methods in Ruby (e.g. Integer#times and Array#each) because opt_succ (i = i.succ) is faster to dispatch on the interpreter than putobject 1; opt_plus (i += 1).

Since YJIT currently doesn't optimize Integer#succ, it's rather slower than opt_plus. This PR fixes this problem to improve the performance of Array#each when it's rewritten in Ruby.

This also speeds up Integer#times on YJIT.

$ benchmark-driver benchmark/loop_times.rb -v --chruby 'before::before --yjit-call-threshold=1;after::after --yjit-call-threshold=1'
before: ruby 3.4.0dev (2024-01-13T00:28:26Z master f7178045bb) +YJIT [x86_64-linux]
after: ruby 3.4.0dev (2024-01-13T01:11:20Z yjit-succ c27641f431) +YJIT [x86_64-linux]
Calculating -------------------------------------
                         before       after
          loop_times      8.963      21.565 i/s -       1.000 times in 0.111565s 0.046371s

Comparison:
                       loop_times
               after:        21.6 i/s
              before:         9.0 i/s - 2.41x  slower