[FIX] sale_coupon: prevent the addition of reward line on copy.
[FIX] sale_coupon: prevent the addition of reward line on copy.

Currently, when there is promotion with usage Automatically Applied
and creating quotation without reward line but on copy of that order
the reward line will be added even the original quote did not have the
reward line(discount).

So in this commit, on copy of the sale order, unlink and apply reward
line only if origin sale order has the reward line.

TaskID: 2228249
OPW-2227968

closes odoo/odoo#49798

X-original-commit: 88aae85cafaeec763a05f49003aff5d593a8922d
Signed-off-by: Jason Van Malder (jvm) <f3b543dc99538be7ecc03fd24be010615c4059c2@odoo.com>
Co-authored-by: Mahendra Barad <3b3224a779cebe67ffd80b3eb2c72ee770072a68@odoo.com>
Co-authored-by: Rushi Sathawara <b6ea6747576f51a8d3bb542e4b12d51481212604@odoo.com>

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