feat(express): add qr param to sendmany, sendcoins, prebuildAndSign s… #2904

Job	Run time
Generate head API spec	6m 35s
Generate merge base API spec	6m 49s
Check specs identical	6s
Check breaking changes	22s
Generate vacuum reports for API spec	12s
API Spec Check	6s
Linter Override	-1s
	14m 9s

Provide feedback