GeezerVison

Fixes #10053.

RubyHashLinkedBuckets#merge_bang (which merge, merge! and update use) yielded one Array [key, old_value, new_value] to the block. It now yields the three values with block.yieldValues, like the rb_yield_values(3, k, v, newvalue) call in CRuby's rb_hash_update_block_callback.

A block with exactly |key, old, new| works as before. Other blocks now get what CRuby gives them:

ENV.update and ENV.merge! with a block go through the same method, so they change the same way. CRuby yields three values there too (hash.c#L6798).

This adds an example for merge and one for merge! to spec/ruby/core/hash/merge_spec.rb. They fail before this change and pass after it, and pass on CRuby 4.0.9 and 3.4.12. Tested with spec/ruby/core/hash and spec/ruby/core/env (also with -Xjit.threshold=0 and -X-C), test/mri/ruby/test_hash.rb and test/mri/ruby/test_env.rb. No new failures.

This is the master version of #10054, which makes the same change in RubyHash on jruby-10.0. With this merged, the merge-forward of #10054 can keep master's side of RubyHash.java and merge_spec.rb.