CI: remote buildah bud flake: bud-with-mount-cache-like-buildkit

[Luap99]

I have seen this a few times in the past few days

not ok 379 bud-with-mount-cache-like-buildkit
         # (from function `assert' in file tests/[helpers.bash, line 578](https://github.com/containers/podman/blob/e8fc1e679a9d13aa1c9874d4868d9ed3e564e307/test/system/helpers.bash#L578),
         #  from function `expect_output' in file tests/[helpers.bash, line 605](https://github.com/containers/podman/blob/e8fc1e679a9d13aa1c9874d4868d9ed3e564e307/test/system/helpers.bash#L605),
         #  in test file tests/[bud.bats, line 6762](https://github.com/containers/podman/blob/e8fc1e679a9d13aa1c9874d4868d9ed3e564e307/test/system/bud.bats#L6762))
         #   `expect_output --substring "hello"' failed
         # /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1/tests /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1
         # # podman --root /var/tmp/buildah_tests.rx8yaw/root --runroot /var/tmp/buildah_tests.rx8yaw/runroot --storage-driver vfs --registries-conf /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1/tests/registries.conf system service [...] unix:///run/podman/podman-379.sock
         # # [checking for: docker.io/library/alpine]
         # # [restoring from cache: /var/tmp/bats-run-ohJTlp/suite/buildah-image-cache / docker.io/library/alpine]
         # Getting image source signatures
         # Copying blob sha256:9d16cba9fb961d1aafec9542f2bf7cb64acfc55245f9e4eb5abecd4cdc38d749
         # Copying config sha256:961769676411f082461f9ef46626dd7a2d1e2b2a38e6a44364bcbecf51e66dd4
         # Writing manifest to image destination
         # # podman-remote build --force-rm=false --layers=false -t testbud --signature-policy /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1/tests/policy.json -f /var/tmp/buildah_tests.rx8yaw/buildkit-mount/Dockerfilecachewrite
         # STEP 1/3: FROM alpine
         # STEP 2/3: RUN mkdir /test
         # STEP 3/3: RUN --mount=type=cache,target=/test,z echo hello > /test/world
         # COMMIT testbud
         # Getting image source signatures
         # Copying blob sha256:03901b4a2ea88eeaad62dbe59b072b28b6efa00491962b8741081c5df50c65e0
         # Copying blob sha256:aa1f7b673e85ceda43f632fbdf22dfa24606d46b0f463d09e33c413f8d902856
         # Copying config sha256:f306c98a9e850b7ab37b51a97fdf396a565220c7d6c3d70579604f97c13c1556
         # Writing manifest to image destination
         # --> f306c98a9e85
         # Successfully tagged localhost/testbud:latest
         # f306c98a9e850b7ab37b51a97fdf396a565220c7d6c3d70579604f97c13c1556
         # # podman-remote build --force-rm=false --layers=false -t testbud2 --signature-policy /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1/tests/policy.json -f /var/tmp/buildah_tests.rx8yaw/buildkit-mount/Dockerfilecacheread
         # STEP 1/3: FROM alpine
         # STEP 2/3: RUN mkdir /test
         # STEP 3/3: RUN --mount=type=cache,target=/test,z cat /test/world
         # world
         # COMMIT testbud2
         # Getting image source signatures
         # Copying blob sha256:03901b4a2ea88eeaad62dbe59b072b28b6efa00491962b8741081c5df50c65e0
         # Copying blob sha256:1fd84a4521c521bb77975e7ab2a6e76112b53f324d1116f35c06f58fd624aca9
         # Copying config sha256:f3a381b03bdf0ef65da6c59393837e1ce842d83b923699e7c4a82612b1b8d921
         # Writing manifest to image destination
         # --> f3a381b03bdf
         # Successfully tagged localhost/testbud2:latest
         # f3a381b03bdf0ef65da6c59393837e1ce842d83b923699e7c4a82612b1b8d921
         # #/vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
         # #|     FAIL: podman-remote build --force-rm=false --layers=false -t testbud2 --signature-policy /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1/tests/policy.json -f /var/tmp/buildah_tests.rx8yaw/buildkit-mount/Dockerfilecacheread
         # #| expected: =~ 'hello'
         # #|   actual:    'STEP 1/3: FROM alpine'
         # #|         >    'STEP 2/3: RUN mkdir /test'
         # #|         >    'STEP 3/3: RUN --mount=type=cache,target=/test,z cat /test/world'
         # #|         >    'world'
         # #|         >    'COMMIT testbud2'
         # #|         >    'Getting image source signatures'
         # #|         >    'Copying blob sha256:03901b4a2ea88eeaad62dbe59b072b28b6efa00491962b8741081c5df50c65e0'
         # #|         >    'Copying blob sha256:1fd84a4521c521bb77975e7ab2a6e76112b53f324d1116f35c06f58fd624aca9'
         # #|         >    'Copying config sha256:f3a381b03bdf0ef65da6c59393837e1ce842d83b923699e7c4a82612b1b8d921'
         # #|         >    'Writing manifest to image destination'
         # #|         >    '--> f3a381b03bdf'
         # #|         >    'Successfully tagged localhost/testbud2:latest'
         # #|         >    'f3a381b03bdf0ef65da6c59393837e1ce842d83b923699e7c4a82612b1b8d921'
         # #\^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         # teardown: stopping podman server 162470
         # /var/tmp/go/src/github.com/containers/podman/test-buildah-v1.39.1

Only when running through podman-remote though so likely a podman problem and no buildah.

example logs:
https://api.cirrus-ci.com/v1/artifact/task/6045792848314368/html/bud-remote-fedora-41-root-host-sqlite.log.html
https://api.cirrus-ci.com/v1/artifact/task/4936405345894400/html/bud-remote-fedora-41-root-host-sqlite.log.html