Update module github.com/moby/buildkit to v0.12.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/moby/buildkit	require	patch	v0.12.2 -> v0.12.3

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Release Notes

moby/buildkit (github.com/moby/buildkit)

v0.12.3

Compare Source

Welcome to the 0.12.3 release of buildkit!

Please try out the release binaries and report any issues at
https://github.com/moby/buildkit/issues.

Notable changes

• Fix possible duplicate source files in provenance attestation for chained builds #​4190
• Fix possible negative step time in progressbar for step shared with other build request #​4183
• Fix properly closing history and cache DB on shutdown to avoid corruption #​4185 #​4189
• Fix incorrect error handling for invalid HTTP source URLs #​4201
• Fix fallback cases for ambiguous insecure configuration provided for registry used as push target. #​4299
• Fix possible data race with parallel image config resolves #​4157
• Fix regression in v0.12 for clients waiting on buildkitd to become available #​4200
• Fix Cgroup NS handling for hosts supporting only CgroupV1 #​4308

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