go.mod: replace inet.af/tcpproxy -> github.com/inetaf/tcpproxy #5607

Job	Run time
Integration tests	17m 40s
Integration tests (on Linux) (alpine.yaml)	6m 28s
Colima (v0.6.5)	7m 41s
Integration tests (on Linux) (debian.yaml)	7m 2s
Integration tests (on Linux) (fedora.yaml)	7m 48s
Lints	3m 54s
Unit tests (1.22.x)	5m 51s
Integration tests (on Linux) (archlinux.yaml)	8m 46s
Unit tests (1.23.x)	5m 33s
Integration tests (on Linux) (opensuse.yaml)	8m 11s
Upgrade test (v0.15.1)	21m 12s
Integration tests (on Linux) (experimental/net-user-v2.yaml)	7m 43s
Integration tests (on Linux) (experimental/9p.yaml)	7m 23s
VMNet test	15m 13s
vz (default.yaml)	17m 44s
Integration tests (on Linux) (docker.yaml)	8m 21s
vz (fedora.yaml)	15m 28s
Integration tests (on Linux) (../hack/test-templates/alpine-9p-writable.yaml)	6m 3s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	20m 12s
Windows tests	7m 56s
	3h 26m 9s

Provide feedback