Rename aperture courier type to hashmail courier type #1282

Job	Run time
cross compilation	4m 55s
run itests	7m 8s
Format check	23s
Compilation check	36s
run itests postgres	15m 32s
Lint check	2m 57s
go mod check	26s
RPC check	1m 32s
Sqlc check	37s
test vector check	44s
run unit tests (unit-race)	6m 29s
run unit tests (unit-cover)	1m 42s
run unit tests (unit dbbackend=postgres)	3m 46s
	46m 47s

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