monitoring: bump default metrics collection timeout to 120s #3685

Job	Run time
Format check	19s
Compilation check	42s
cross compilation	4m 31s
Docker build check	3m 38s
run itests	9m 29s
run itests postgres	17m 41s
Lint check	2m 40s
migration version check	11s
go mod check	29s
RPC check	1m 13s
run LiT tests	13m 50s
sample configuration check	35s
Sqlc check	2m 44s
test vector check	43s
run unit tests (unit-race)	12m 37s
run unit tests (unit-cover)	3m 1s
run unit tests (unit dbbackend=postgres)	6m 2s
finish	4s
	1h 20m 29s

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