Fix port mirror rejection in intproxy (#2998) #13681

Job	Run time
towncrier_check	7s
check_if_release_branch	1s
changed_files	7s
build mirrord CLI	0s
check-rust-docs	4m 28s
lint	12m 32s
integration_tests	14m 39s
lint_markdown	0s
macos_tests	33m 2s
test_agent	3m 11s
test_agent_image	6m 12s
test_cli_image	14m 58s
intellij_e2e_on_release_branch	0s
vscode_e2e_on_release_branch	0s
e2e (docker)	13m 44s
e2e (containerd)	14m 55s
ci	1s
	1h 57m 57s

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