GH-123232: Fix "not specialized" stats

[markshannon]

• Add deferred stats for BINARY_SLICE and STORE_SLICE both of which we regard as specializable, even though we don't specialize them yet.
• Don't count branches as "not specialized"

• Issue: "Deferred by Instruction" stats don't add up. #123232

[brandtbucher]

@markshannon, this broke JIT stats builds since OPCODE_DEFERRED_INC uses the tier one interpreter's opcode local variable, which is meaningless in tier two. Should these new uses be guarded with #if TIER_ONE?