Update 29-rc to 29.6.0-rc.1, buildx 0.34.1, compose 5.1.4 #921

Job	Run time
Generate Jobs	42s
29.6.0-rc.1-windowsservercore-ltsc2022	3m 34s
29.6.0-rc.1-windowsservercore-ltsc2025	6m 52s
29.5.3-cli, 29.5.3-dind, 29.5.3-dind-rootless	58s
29.5.3-windowsservercore-ltsc2022	2m 59s
29.6.0-rc.1-cli, 29.6.0-rc.1-dind, 29.6.0-rc.1-dind-rootless	1m 13s
29.5.3-windowsservercore-ltsc2025	6m 55s
	23m 13s

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