Tag PR image build as latest before scanning #1046

Job	Run time
build / Build	7m 5s
E2E Tests (startup)	10m 39s
Docker Tests (basics)	55s
E2E Tests (s3)	8m 19s
Docker Tests (bootstraptoken)	47s
E2E Tests (btrfs)	4m 29s
Docker Tests (cacerts)	53s
Docker Tests (compat)	2m 40s
E2E Tests (externalip)	4m 50s
Docker Tests (lazypull)	51s
E2E Tests (privateregistry)	6m 38s
Docker Tests (upgrade)	2m 39s
E2E Tests (embeddedmirror)	5m 19s
E2E Tests (wasm)	4m 10s
	1h 0m 14s

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