roachtest: transfer-leases/drain failed

[cockroach-teamcity]

(roachtest).transfer-leases/drain failed on provisional_202006230817_v20.1.3@7fd454f880f386cdd0eda6b21b12f6532c14f0db:

The test failed on branch=provisional_202006230817_v20.1.3, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/transfer-leases/drain/run_1
	cluster.go:1969,quit.go:96,quit.go:88,quit.go:142,context.go:135,quit.go:141,quit.go:88,quit.go:46,quit.go:340,test_runner.go:753: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/bin/roachprod start --env=COCKROACH_SCAN_MAX_IDLE_TIME=5ms -a --vmodule=store=1,replica=1,replica_proposal=1 teamcity-2032995-1592933600-22-n3cpu4:2 returned: context deadline exceeded
		(1) /home/agent/work/.go/src/github.com/cockroachdb/cockroach/bin/roachprod start --env=COCKROACH_SCAN_MAX_IDLE_TIME=5ms -a --vmodule=store=1,replica=1,replica_proposal=1 teamcity-2032995-1592933600-22-n3cpu4:2 returned
		  | stderr:
		  |
		  | stdout:
		  | teamcity-2032995-1592933600-22-n3cpu4: starting...........................................................
		Wraps: (2) secondary error attachment
		  | signal: killed
		  | (1) signal: killed
		  | Error types: (1) *exec.ExitError
		Wraps: (3) context deadline exceeded
		Error types: (1) *main.withCommandDetails (2) *secondary.withSecondaryError (3) context.deadlineExceededError

	cluster.go:1512,context.go:135,cluster.go:1501,test_runner.go:825: dead node detection: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/bin/roachprod monitor teamcity-2032995-1592933600-22-n3cpu4 --oneshot --ignore-empty-nodes: exit status 1 3: 14866
		2: dead
		1: 22260
		Error: UNCLASSIFIED_PROBLEM: 2: dead
		(1) UNCLASSIFIED_PROBLEM
		Wraps: (2) attached stack trace
		  | main.glob..func13
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachprod/main.go:1115
		  | main.wrap.func1
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachprod/main.go:266
		  | github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra.(*Command).execute
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra/command.go:766
		  | github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra.(*Command).ExecuteC
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra/command.go:852
		  | github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra.(*Command).Execute
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra/command.go:800
		  | main.main
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachprod/main.go:1789
		  | runtime.main
		  | 	/usr/local/go/src/runtime/proc.go:203
		  | runtime.goexit
		  | 	/usr/local/go/src/runtime/asm_amd64.s:1357
		Wraps: (3) 3 safe details enclosed
		Wraps: (4) 2: dead
		Error types: (1) errors.Unclassified (2) *withstack.withStack (3) *safedetails.withSafeDetails (4) *errors.errorString

More

Artifacts: /transfer-leases/drain

See this test on roachdash
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[asubiotto]

Signed off as an infra flake in #50528