clang-format: Disable alignment of operands, too unreliable

Sets `AlignOperands` to `DontAlign`.

`clang-format` developers seem to mostly care about space-based indentation and
every other version of clang-format breaks the bad mismatch of tabs and spaces
that it seems to use for operand alignment. So it's better without, so that it
respects our two-tabs `ContinuationIndentWidth`.

core/math/vector2.cpp

@@ -149,10 +149,11 @@ Vector2 Vector2::cubic_interpolate(const Vector2 &p_b, const Vector2 &p_pre_a, c
 	real_t t3 = t2 * t;
 
 	Vector2 out;
-	out = 0.5 * ((p1 * 2.0) +
-						(-p0 + p2) * t +
-						(2.0 * p0 - 5.0 * p1 + 4 * p2 - p3) * t2 +
-						(-p0 + 3.0 * p1 - 3.0 * p2 + p3) * t3);
+	out = 0.5 *
+			((p1 * 2.0) +
+					(-p0 + p2) * t +
+					(2.0 * p0 - 5.0 * p1 + 4 * p2 - p3) * t2 +
+					(-p0 + 3.0 * p1 - 3.0 * p2 + p3) * t3);
 	return out;
 }