* introduce xcm weight traits

* patch some low hanging fruit

* add weightinfobound

* use checked math rather than saturating

* Update xcm/xcm-builder/src/weight.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Revert "Update xcm/xcm-builder/src/weight.rs"

This reverts commit 6331b874

.

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>