Merge pull request #10577 from ethereum/deleteMappingSol2Yul

[Sol->Yul] Skipping mapping types when deleting structs and arrays.

test/libsolidity/semanticTests/storage/mappings_array2d_pop_delete.sol

@@ -28,6 +28,8 @@ contract C {
 		return a.length;
 	}
 }
+// ====
+// compileViaYul: also
 // ----
 // n1(uint256,uint256): 42, 64 ->
 // map(uint256): 42 -> 64

test/libsolidity/semanticTests/storage/mappings_array_pop_delete.sol

@@ -23,6 +23,8 @@ contract C {
 		return a.length;
 	}
 }
+// ====
+// compileViaYul: also
 // ----
 // n1(uint256,uint256): 42, 64 ->
 // map(uint256): 42 -> 64

test/libsolidity/semanticTests/structs/delete_struct.sol

@@ -38,6 +38,8 @@ contract test {
         return str.nstr.nestedMapping[index];
     }
 }
+// ====
+// compileViaYul: also
 // ----
 // getToDelete() -> 0
 // getTopValue() -> 0