[isoltest] Enforcing compileViaYul to be set if test can pass via yul

test/libsolidity/semanticTests/various/decayed_tuple.sol

@@ -5,6 +5,7 @@ contract C {
         return x;
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // f() -> 2

test/libsolidity/semanticTests/various/inline_member_init.sol

@@ -14,6 +14,7 @@ contract test {
         c = m_c;
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // get() -> 5, 6, 8

test/libsolidity/semanticTests/various/inline_member_init_inheritence.sol

@@ -18,7 +18,8 @@ contract Derived is Base {
         return m_derived;
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // getBMember() -> 5
 // getDMember() -> 6

test/libsolidity/semanticTests/various/literal_empty_string.sol

@@ -12,6 +12,8 @@ contract C {
     }
 }
 
+// ====
+// compileViaYul: also
 // ----
 // x() -> 0
 // a() -> 0

test/libsolidity/semanticTests/various/multi_variable_declaration.sol

@@ -42,6 +42,7 @@ contract C {
         return f1() && f2();
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // f() -> true

test/libsolidity/semanticTests/various/positive_integers_to_signed.sol

@@ -3,7 +3,8 @@ contract test {
     int8 public y = 127;
     int16 public q = 250;
 }
-
+// ====
+// compileViaYul: also
 // ----
 // x() -> 2
 // y() -> 127

test/libsolidity/semanticTests/various/skip_dynamic_types.sol

@@ -10,6 +10,7 @@ contract C {
         return (a, b);
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // g() -> 7, 8

test/libsolidity/semanticTests/various/storage_string_as_mapping_key_without_variable.sol

@@ -6,6 +6,7 @@ contract Test {
         return data["abc"];
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // f() -> 2

test/libsolidity/semanticTests/various/string_tuples.sol

@@ -11,7 +11,8 @@ contract C {
         return ("abc");
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // f() -> 0x40, 0x8, 0x3, "abc"
 // g() -> 0x40, 0x80, 0x3, "abc", 0x3, "def"

test/libsolidity/semanticTests/various/test_underscore_in_hex.sol

@@ -5,6 +5,8 @@ contract test {
         return cond ? x : y;
     }
 }
+// ====
+// compileViaYul: also
 // ----
 // f(bool): true -> 0x1234ab
 // f(bool): false -> 0x1234abcd1234

test/libsolidity/semanticTests/various/tuples.sol

@@ -25,6 +25,7 @@ contract C {
         if (a != 8 || b != 10) return 4;
     }
 }
-
+// ====
+// compileViaYul: also
 // ----
 // f() -> 0