YJIT: Fix super() from a block method not rooted in a "def" method #96

Job	Run time
tarball	3m 28s
windows / Windows 2025-vs2026 (check)	26m 3s
windows / Windows 2022 (check)	22m 24s
non_development / non_development (default, false)	4m 11s
non_development / non_development (no-ruby, true)	4m 36s
non_development / non_development (baseruby-no, false, --with-baseruby=no)	4m 3s
ubuntu / ubuntu (check, ubuntu-22.04)	9m 18s
ubuntu / ubuntu (test-bundler-parallel, ubuntu-22.04)	15m 4s
ubuntu / ubuntu (test-bundler-parallel, ubuntu-24.04)	16m 55s
ubuntu / ubuntu (check, ubuntu-24.04)	7m 11s
ubuntu / ubuntu (test-bundled-gems, ubuntu-24.04)	8m 9s
macos / macos (test-bundled-gems, macos-26)	6m 0s
ubuntu / ubuntu (test-bundled-gems, ubuntu-22.04)	8m 9s
macos / macos (test-bundled-gems, macos-15)	7m 35s
macos / macos (check, macos-26)	8m 6s
macos / macos (check, macos-14)	6m 31s
macos / macos (check, macos-15)	7m 9s
macos / macos (test-bundler-parallel, macos-15)	20m 4s
macos / macos (test-bundler-parallel, macos-14)	22m 30s
macos / macos (test-bundler-parallel, macos-26)	23m 21s
macos / macos (macos-15-intel, check, /tmp/ruby-prefix)	17m 24s
macos / macos (test-bundled-gems, macos-14)	7m 40s
	4h 15m 51s

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