chore: Add support for 2.7.0, drop 1.27.0 and 2.4.0 #89

Job	Run time
Detect relevant changed files	6s
Run cargo-udeps	2m 7s
Build/Publish amd64 Image	6m 28s
Build/Publish arm64 Image	5m 50s
Package/Publish 0.0.0-pr893 Helm Chart	31s
Publish/Sign 0.0.0-pr893 Index	27s
Run OpenShift Preflight Check for 0.0.0-pr893-amd64	24s
Run OpenShift Preflight Check for 0.0.0-pr893-arm64	17s
Failure Notification	-1s
Finished Build and Publish	2s
	16m 11s

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