Bump github.com/onsi/ginkgo/v2 from 2.15.0 to 2.16.0 #2646

Job	Run time
Gateway Conformance Tests (1.23.17, nginx, true)	2m 27s
Gateway Conformance Tests (1.23.17, nginx, true)	8m 35s
Gateway Conformance Tests (1.23.17, nginx, false)	2m 34s
Gateway Conformance Tests (1.23.17, nginx, false)	9m 49s
Gateway Conformance Tests (1.23.17, nginx-plus, true)	2m 12s
Gateway Conformance Tests (1.23.17, nginx-plus, true)	11m 22s
Gateway Conformance Tests (1.23.17, nginx-plus, false)	2m 35s
Gateway Conformance Tests (1.23.17, nginx-plus, false)	9m 3s
Gateway Conformance Tests (latest, nginx, true)	2m 33s
Gateway Conformance Tests (latest, nginx, true)	7m 56s
Gateway Conformance Tests (latest, nginx, false)	2m 33s
Gateway Conformance Tests (latest, nginx, false)	10m 5s
Gateway Conformance Tests (latest, nginx-plus, true)	2m 36s
Gateway Conformance Tests (latest, nginx-plus, true)	9m 59s
Gateway Conformance Tests (latest, nginx-plus, false)	2m 35s
Gateway Conformance Tests (latest, nginx-plus, false)	9m 59s
	1h 36m 53s

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