podman: pasta: timeout again (rawhide)

Resurrecting #17598. Pasta test timing out again. Seen in rawhide with passt-0^20230908.g05627dc-1.fc40-x86_64:

[+1596s] ok 556 podman networking with pasta(1) - TCP/IPv4 small transfer, loopback
[+1726s] not ok 557 podman networking with pasta(1) - TCP/IPv4 large transfer, tap
         # (from function `die' in file test/system/helpers.bash, line 747,
         #  from function `run_podman' in file test/system/helpers.bash, line 384,
         #  from function `pasta_test_do' in file test/system/505-networking-pasta.bats, line 248,
         #  in test file test/system/505-networking-pasta.bats, line 700)
         #   `pasta_test_do' failed
         #
         # [20:56:52.117914919] $ /var/tmp/go/src/github.com/containers/podman/bin/podman rm -t 0 --all --force --ignore
         # [20:56:52.226806205] 42b6b5a167b84848f4b09d240ee31f69736ad905a0761bf4b53a4539b2879ceb
         #
         # [20:56:52.238402603] $ /var/tmp/go/src/github.com/containers/podman/bin/podman ps --all --external --format {{.ID}} {{.Names}}
         #
         # [20:56:52.314645311] $ /var/tmp/go/src/github.com/containers/podman/bin/podman images --all --format {{.Repository}}:{{.Tag}} {{.ID}}
         # [20:56:52.386168270] quay.io/libpod/testimage:20221018 f5a99120db64
         # 1+0 records in
         # 1+0 records out
         # 10485760 bytes (10 MB, 10 MiB) copied, 0.0408792 s, 257 MB/s
         #
         # [20:56:52.693255830] $ /var/tmp/go/src/github.com/containers/podman/bin/podman run --net=pasta -p [10.128.0.120]:5294:5294/tcp quay.io/libpod/testimage:20221018 sh -c for port in $(seq 5294 5294); do                              socat -u TCP4-LISTEN:${port},bind=[10.128.0.120] EXEC:md5sum &                          done; wait
         # [20:59:02.709781235] timeout: sending signal TERM to command ?/var/tmp/go/src/github.com/containers/podman/bin/podman?
         # timeout: sending signal KILL to command ?/var/tmp/go/src/github.com/containers/podman/bin/podman?
         # [20:59:02.716663367] [ rc=137 (** EXPECTED 0 **) ]

This is f40 rawhide, not f39; and it is an in-progress PR. Podman is not yet testing f40 rawhide, so we are unlikely to see this flake often… until that PR merges.