Backport XCM fixes to 1.5.0 (#3174)

- Transactional processing
- Delivery fees taken from holding

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Signed-off-by: Adrian Catangiu <[email protected]>
Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Adrian Catangiu <[email protected]>
Co-authored-by: Just van Stam <[email protected]>
Co-authored-by: Keith Yeung <[email protected]>
Co-authored-by: Alexander Samusev <[email protected]>
Co-authored-by: Dónal Murray <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: PG Herveou <[email protected]>