docker-build: add docker readiness check and update builder image

[szuo-hv]

Changes

Summary
Adds a bounded docker-info readiness step to avoid indefinite hangs when the DinD daemon is not ready, and updates the default builder_image to Docker 29 (linux/amd64, digest‑pinned).

Details

• New docker-info step retries docker info up to 60 times with clear failure output.
• builder_image bumped to:
  docker.io/library/docker@sha256:2658fda9e8779b94ea1581f4d25214dac9ed144b407902842e5328cce8f861f5
• No user‑facing parameters changed.

Fixes #628

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Details

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• task/docker-build/0.1/OWNERS

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[linux-foundation-easycla]

• ❌ - login: @szuo-hv / name: Shiwan Zuo . The commit (aad02a0) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[szuo-hv]

/kind bug

[tekton-robot]

Catlin Output

FILE: task/docker-build/0.1/docker-build.yaml
WARN : Step "docker-info" uses image "$(params.builder_image)" that contains variables; skipping validation
WARN : Step "docker-build" uses image "$(params.builder_image)" that contains variables; skipping validation
WARN : Step "docker-push" uses image "$(params.builder_image)" that contains variables; skipping validation

Catlin script lint Output

WARN : step: docker-build is not using #!/usr/bin/env 
ERROR: /usr/bin/shellcheck, [-s sh] failed:

In docker-build-docker-build line 3:
  $(params.build_extra_args) \
  ^------------------------^ SC2046 (warning): Quote this to prevent word splitting.


In docker-build-docker-build line 5:
  -f $(params.dockerfile) -t $(params.image) $(params.context)
     ^------------------^ SC2046 (warning): Quote this to prevent word splitting.
                             ^-------------^ SC2046 (warning): Quote this to prevent word splitting.
                                             ^---------------^ SC2046 (warning): Quote this to prevent word splitting.

For more information:
  https://www.shellcheck.net/wiki/SC2046 -- Quote this to prevent word splitt...

ERROR: /usr/bin/shellcheck, [-s sh] failed:

In docker-build-docker-push line 2:
docker push $(params.push_extra_args) $(params.image)
            ^-----------------------^ SC2046 (warning): Quote this to prevent word splitting.
                                      ^-------------^ SC2046 (warning): Quote this to prevent word splitting.

For more information:
  https://www.shellcheck.net/wiki/SC2046 -- Quote this to prevent word splitt...