chore: Release 26.3.0-rc1 (#762) #268

Job	Run time
Detect relevant changed files	7s
Run cargo-udeps	1m 54s
Build/Publish amd64 Image	7m 40s
Build/Publish arm64 Image	4m 16s
Publish/Sign 26.3.0-rc1 Index	34s
Package/Publish 26.3.0-rc1 Helm Chart	32s
Run OpenShift Preflight Check for 26.3.0-rc1-arm64	19s
Run OpenShift Preflight Check for 26.3.0-rc1-amd64	22s
Failure Notification	-1s
Finished Build and Publish	3s
	15m 46s

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