[Interpreter] Refactor bytecode generator test suite.

test/cctest/interpreter/bytecode_expectations/Throw.golden

+#
+# Autogenerated by generate-bytecode-expectations
+#
+
+---
+pool type: string
+execute: yes
+wrap: yes
+
+---
+snippet: "
+  throw 1;
+"
+frame size: 0
+parameter count: 1
+bytecode array length: 4
+bytecodes: [
+  B(StackCheck),
+  B(LdaSmi8), U8(1),
+  B(Throw),
+]
+constant pool: [
+]
+handlers: [
+]
+
+---
+snippet: "
+  throw 'Error';
+"
+frame size: 0
+parameter count: 1
+bytecode array length: 4
+bytecodes: [
+  B(StackCheck),
+  B(LdaConstant), U8(0),
+  B(Throw),
+]
+constant pool: [
+  "Error",
+]
+handlers: [
+]
+
+---
+snippet: "
+  var a = 1; if (a) { throw 'Error'; };
+"
+frame size: 1
+parameter count: 1
+bytecode array length: 12
+bytecodes: [
+  B(StackCheck),
+  B(LdaSmi8), U8(1),
+  B(Star), R(0),
+  B(JumpIfToBooleanFalse), U8(5),
+  B(LdaConstant), U8(0),
+  B(Throw),
+  B(LdaUndefined),
+  B(Return),
+]
+constant pool: [
+  "Error",
+]
+handlers: [
+]
+