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/transform_2d.cpp

@@ -298,6 +298,6 @@ Transform2D Transform2D::operator*(const real_t p_val) const {
 
 Transform2D::operator String() const {
 	return "[X: " + elements[0].operator String() +
-		   ", Y: " + elements[1].operator String() +
-		   ", O: " + elements[2].operator String() + "]";
+			", Y: " + elements[1].operator String() +
+			", O: " + elements[2].operator String() + "]";
 }