fix: prevent multiple channel close in Telemetry Stop method #1949

Job	Run time
count	4m 25s
build_bin	14s
testunit (ubuntu-24.04, 1.21, .)	1m 9s
testunit (ubuntu-24.04, 1.21, pkgconfig)	10s
testunit (ubuntu-24.04, 1.21, pkginit)	1m 12s
testunit (ubuntu-24.04, 1.21, dnsutils)	25s
testunit (ubuntu-24.04, 1.21, workers)	4m 26s
testunit (ubuntu-24.04, 1.21, transformers)	39s
testunit (ubuntu-24.04, 1.21, telemetry)	24s
testunit (ubuntu-24.04, 1.22, .)	1m 11s
testunit (ubuntu-24.04, 1.22, pkgconfig)	9s
testunit (ubuntu-24.04, 1.22, pkginit)	1m 3s
testunit (ubuntu-24.04, 1.22, dnsutils)	20s
testunit (ubuntu-24.04, 1.22, workers)	4m 17s
testunit (ubuntu-24.04, 1.22, transformers)	36s
testunit (ubuntu-24.04, 1.22, telemetry)	19s
testunit (ubuntu-24.04, 1.23, .)	1m 0s
testunit (ubuntu-24.04, 1.23, pkgconfig)	6s
testunit (ubuntu-24.04, 1.23, pkginit)	1m 9s
testunit (ubuntu-24.04, 1.23, dnsutils)	24s
testunit (ubuntu-24.04, 1.23, workers)	4m 18s
testunit (ubuntu-24.04, 1.23, transformers)	35s
testunit (ubuntu-24.04, 1.23, telemetry)	23s
metrics	10s
config	13s
	29m 17s

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