ci: Push Helm charts to GH Pages Helm registry #6866

Job	Run time
Build and push backend image	2m 1s
Build and push backend image	2m 1s
Build and push frontend image	1m 32s
Build and push frontend image	1m 32s
Build and push guacamole image	33s
Build and push guacamole image	33s
Build and push session-preparation image	17s
Build and push session-preparation image	17s
Build and push docs image	28s
Build and push docs image	28s
Install chart in kind cluster	5m 57s
Install chart in kind cluster	2m 6s
	17m 45s

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