Merge pull request #49193 from thaJeztah/internalize_pkg_parsers #732

Job	Run time
validate-dco / run	27s
build	2m 27s
test (dockerd, client, integration)	14m 58s
test (dockerd, cmd/buildctl, integration)	8m 32s
test (dockerd, solver, integration)	8m 6s
test (dockerd, frontend, integration)	8m 30s
test (dockerd, frontend/dockerfile, integration)	14m 58s
test (dockerd-containerd, client, integration)	14m 36s
test (dockerd-containerd, cmd/buildctl, integration)	8m 7s
test (dockerd-containerd, solver, integration)	8m 7s
test (dockerd-containerd, frontend, integration)	8m 21s
test (dockerd-containerd, frontend/dockerfile, integration)	13m 32s
	1h 50m 41s

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