[Yul] Directly jump over a series of function definitions

Implement a AbstractAssembly::setStackHeight function
Update the tests
Update Changelog

test/libyul/StackReuseCodegen.cpp

@@ -277,16 +277,15 @@ BOOST_AUTO_TEST_CASE(functions_multi_return)
 		let unused := 7
 	})";
 	BOOST_CHECK_EQUAL(assemble(in),
-		"PUSH1 0xB JUMP "
+		"PUSH1 0x13 JUMP "
 		"JUMPDEST PUSH1 0x0 SWAP3 SWAP2 POP POP JUMP " // f
-		"JUMPDEST PUSH1 0x17 JUMP "
 		"JUMPDEST PUSH1 0x0 PUSH1 0x0 SWAP1 SWAP2 JUMP " // g
-		"JUMPDEST PUSH1 0x21 PUSH1 0x2 PUSH1 0x1 PUSH1 0x3 JUMP " // f(1, 2)
-		"JUMPDEST PUSH1 0x2B PUSH1 0x4 PUSH1 0x3 PUSH1 0x3 JUMP " // f(3, 4)
+		"JUMPDEST PUSH1 0x1D PUSH1 0x2 PUSH1 0x1 PUSH1 0x3 JUMP " // f(1, 2)
+		"JUMPDEST PUSH1 0x27 PUSH1 0x4 PUSH1 0x3 PUSH1 0x3 JUMP " // f(3, 4)
 		"JUMPDEST SWAP1 POP " // assignment to x
 		"POP " // remove x
-		"PUSH1 0x34 PUSH1 0xF JUMP " // g()
-		"JUMPDEST PUSH1 0x3A PUSH1 0xF JUMP " // g()
+		"PUSH1 0x30 PUSH1 0xB JUMP " // g()
+		"JUMPDEST PUSH1 0x36 PUSH1 0xB JUMP " // g()
 		"JUMPDEST SWAP2 POP SWAP2 POP " // assignments
 		"POP POP " // removal of y and z
 		"PUSH1 0x7 POP "

test/libyul/objectCompiler/function_series.yul

@@ -0,0 +1,28 @@
+object "Contract" {
+  code {
+    function f() {}
+    function g() {}
+    sstore(0, 1)
+  }
+}
+
+// ----
+// Assembly:
+//     /* "source":33:48   */
+//   jump(tag_1)
+// tag_2:
+//     /* "source":46:48   */
+//   jump
+//     /* "source":53:68   */
+// tag_3:
+//     /* "source":66:68   */
+//   jump
+// tag_1:
+//     /* "source":83:84   */
+//   0x01
+//     /* "source":80:81   */
+//   0x00
+//     /* "source":73:85   */
+//   sstore
+// Bytecode: 6007565b565b565b6001600055
+// Opcodes: PUSH1 0x7 JUMP JUMPDEST JUMP JUMPDEST JUMP JUMPDEST PUSH1 0x1 PUSH1 0x0 SSTORE