Update module github.com/Azure/azure-sdk-for-go/sdk/azcore to v1.21.1 #60899

Job	Run time
setup-environment	2m 0s
arm-unittest-matrix (receiver-0)	7m 27s
arm-unittest-matrix (exporter-0)	3m 28s
arm-unittest-matrix (receiver-3)	6m 47s
arm-unittest-matrix (processor-0)	3m 47s
arm-unittest-matrix (processor-1)	4m 31s
arm-unittest-matrix (receiver-2)	5m 51s
arm-unittest-matrix (receiver-1)	8m 2s
arm-unittest-matrix (cmd-0)	3m 10s
arm-unittest-matrix (other)	5m 49s
arm-unittest-matrix (pkg)	5m 50s
arm-unittest-matrix (extension)	6m 25s
arm-unittest-matrix (exporter-2)	4m 6s
arm-unittest-matrix (connector)	4m 26s
arm-unittest-matrix (exporter-1)	9m 7s
arm-unittest-matrix (internal)	10m 19s
arm-unittest-matrix (exporter-3)	5m 45s
arm-unittest	4s
flakytests-generate-issues	0s
	1h 36m 54s

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