Migrate static handling and most of the operand codegen code to StableMIR #5921

Job	Run time
perf	28m 31s
bookrunner	15m 54s
benchcomp-tests	3m 23s
regression (macos-12)	37m 24s
write-json-symtab-regression	12m 25s
regression (ubuntu-20.04)	19m 25s
regression (ubuntu-22.04)	20m 23s
	2h 17m 25s

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