Replace ExtractLane format with BinaryImm8

Like https://github.com/bytecodealliance/wasmtime/pull/1762, this change the name of the `ExtractLane` format to the more-general `BinaryImm8` and renames its immediate argument from `lane` to `imm`.

cranelift/codegen/meta/src/isa/x86/instructions.rs

@@ -283,7 +283,7 @@ pub(crate) fn define(
     Packed Shuffle Doublewords -- copies data from either memory or lanes in an extended
     register and re-orders the data according to the passed immediate byte.
     "#,
-            &formats.extract_lane,
+            &formats.binary_imm8,
         )
         .operands_in(vec![a, i]) // TODO allow copying from memory here (need more permissive type than TxN)
         .operands_out(vec![a]),
@@ -314,7 +314,7 @@ pub(crate) fn define(
         The lane index, ``Idx``, is an immediate value, not an SSA value. It
         must indicate a valid lane index for the type of ``x``.
         "#,
-            &formats.extract_lane,
+            &formats.binary_imm8,
         )
         .operands_in(vec![x, Idx])
         .operands_out(vec![a]),