fix: language plugins should always include an error with level=ERROR… #1054

Job	Run time
Build Controller Docker Image	2m 54s
Build Runner Docker Image	2m 39s
Build Provisioner Docker Image	2m 19s
Build FTL-in-a-box Docker Image	2m 30s
Release Go Binaries	5m 57s
Release JVM Artifacts	3m 53s
Release Helm Charts	15s
Release VSCode Extension	45s
Release Assets	1m 11s
Release Hermit	11s
	22m 34s

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