gh-134584: Eliminate redundant refcounting in JIT for `MATCH_CLASS` #2315

Job	Run time
x86_64-apple-darwin/clang	19m 56s
x86_64-pc-windows-msvc/msvc	10m 49s
x86_64-pc-windows-msvc/msvc-free-threading	5m 10s
x86_64-unknown-linux-gnu/gcc	9m 49s
aarch64-apple-darwin/clang	9m 41s
aarch64-unknown-linux-gnu/gcc	7m 9s
x86_64-unknown-linux-gnu/gcc-free-threading	8m 40s
	1h 11m 14s

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