Wire up the rest of the sidestake contract machinery #1727

Job	Run time
Lint	1m 15s
ARM [GOAL install] [buster]	10m 45s
Win32	13m 17s
Win64	19m 25s
macOS 11 native [GOAL install] [GUI] [no depends]	9m 51s
i386 Linux [GOAL install] [focal]	11m 41s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	26m 17s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	23m 10s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	14m 37s
	2h 10m 18s

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