Adding sol->yul for f.selector and f.address

test/libsolidity/semanticTests/viaYul/function_address.sol

@@ -0,0 +1,17 @@
+contract C {
+    function f() external returns (address) {
+        return this.f.address;
+    }
+    function g() external returns (bool) {
+      return this.f.address == address(this);
+    }
+    function h(function() external a) public returns (address) {
+      return a.address;
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// f() -> 0x0fdd67305928fcac8d213d1e47bfa6165cd0b87b
+// g() -> true
+// h(function): left(0x1122334400112233445566778899AABBCCDDEEFF42424242) -> 0x1122334400112233445566778899AABBCCDDEEFF

test/libsolidity/semanticTests/viaYul/function_selector.sol

@@ -0,0 +1,13 @@
+contract C {
+    function f() external returns (bytes4) {
+        return this.f.selector;
+    }
+    function h(function() external a) public returns (bytes4) {
+        return a.selector;
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// f() -> left(0x26121ff0)
+// h(function): left(0x1122334400112233445566778899AABBCCDDEEFF42424242) -> left(0x42424242)