Pin E2E tests to 22.04 #412

Job	Run time
build / Build	7m 2s
E2E Tests (startup)	9m 57s
E2E Tests (s3)	8m 27s
Docker Tests (basics)	55s
E2E Tests (btrfs)	4m 36s
Docker Tests (bootstraptoken)	46s
E2E Tests (externalip)	5m 31s
Docker Tests (cacerts)	59s
E2E Tests (privateregistry)	6m 2s
Docker Tests (compat)	2m 47s
E2E Tests (embeddedmirror)	5m 23s
E2E Tests (wasm)	4m 10s
Docker Tests (lazypull)	1m 4s
Docker Tests (upgrade)	2m 39s
	1h 0m 18s

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