Bump golang.org/x/net from 0.21.0 to 0.23.0 in /internal/e2e #23

Job	Run time
govulncheck	59s
setup-environment	38s
lint	2m 8s
checks	51s
unittest-matrix (~1.22)	2m 10s
unittest-matrix (~1.21.5)	2m 3s
cross-build-collector (darwin, amd64)	54s
test-coverage	2m 27s
cross-build-collector (darwin, arm64)	40s
cross-build-collector (linux, 386)	39s
cross-build-collector (linux, amd64)	35s
cross-build-collector (linux, arm64)	36s
cross-build-collector (linux, ppc64le)	43s
cross-build-collector (linux, arm, 7)	56s
cross-build-collector (linux, s390x)	46s
cross-build-collector (windows, 386)	38s
cross-build-collector (windows, amd64)	41s
unittest	1s
	18m 25s

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