JIT

gh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_INSTANCE_VALUE` #4634

Job	Run time
Interpreter (Debug)	4m 45s
JIT without optimizations (Debug)	1s
JIT with tail calling interpreter	1s
${{ matrix.target }} (${{ ((matrix.debug && 'Debug') \|\| 'Release') }})	1s
Free-Threaded (Debug)	1s
	4m 49s

Provide feedback