Show last 20 lines of output in case of error

[AlanCoding]

Demo:

$ ansible-builder build -c alan -f test/data/pytz/execution-environment.yml -t alan --container-runtime=podman
Running command:
  podman build -f alan/Containerfile -t alan alan
Running command:
  podman run --rm -v /home/alancoding/repos/ansible-builder/alan:/context:Z alan python3 /context/_build/introspect.py
Running command:
  podman build -f alan/Containerfile -t alan alan
...showing last 20 lines of output...
--> 059611e0362
STEP 3: RUN ansible-galaxy role install -r /build/_build/requirements.yml --roles-path /usr/share/ansible/roles
--> Using cache 549ff53127e1b226c11eb3584e777f57b4e4466adce530bd4c8d4577783e57f3
--> 549ff53127e
STEP 4: RUN ansible-galaxy collection install -r /build/_build/requirements.yml --collections-path /usr/share/ansible/collections
--> Using cache 7d41130bc43cc7cf089c1207cf51133dafca44b600de54741f5b6efd1a49061a
--> 7d41130bc43
STEP 5: RUN mkdir -p /usr/share/ansible/roles /usr/share/ansible/collections
--> Using cache f92acc5e13b472885c71606a2a32c924825fe7a617f8a8fec8636fe98a408491
--> f92acc5e13b
STEP 6: FROM quay.io/ansible/python-builder:latest AS builder
STEP 7: ADD _build/requirements_combined.txt /tmp/src/requirements.txt
--> Using cache 5292a6c0827ff3e7b5185d60fed58a8e085de1cccdf69d289690207bd92c8071
--> 5292a6c0827
STEP 8: RUN assemble
--> Using cache f0bcc3a7ddff9235302d915bee88157aede0671c3b1369ad1b3cc00bb4b024b3
--> f0bcc3a7ddf
STEP 9: FROM quay.io/ansible/ansible-runner:devel
STEP 10: COPY --from=galaxy /usr/share/ansible/roles /usr/share/ansible/roles
Error: error building at STEP "COPY --from=galaxy /usr/share/ansible/roles /usr/share/ansible/roles": error adding sources [/home/alancoding/.local/share/containers/storage/overlay/41054c5e53e0bdb2152ff1f66f0eb75b0b43f99a3232f35ecf4ee78e5baa538a/merged/usr/share/ansible/roles]: no items matching glob "/home/alancoding/.local/share/containers/storage/overlay/41054c5e53e0bdb2152ff1f66f0eb75b0b43f99a3232f35ecf4ee78e5baa538a/merged/usr/share/ansible/roles" copied (1 filtered out): no such file or directory

An error occured (rc=125), see output line(s) above for details.

Without this, it gives the incoherent output:

$ ansible-builder build -c alan -f test/data/pytz/execution-environment.yml -t alan --container-runtime=podman
Running command:
  podman build -f alan/Containerfile -t alan alan
Running command:
  podman run --rm -v /home/alancoding/repos/ansible-builder/alan:/context:Z alan python3 /context/_build/introspect.py
Running command:
  podman build -f alan/Containerfile -t alan alan

An error occured (rc=125), see output line(s) above for details.

Checked with -v2 and -v3, and those still look good.