Fix K3S_DATA_DIR when running as non-root user #1638

Job	Run time
Build Go Tests	57s
build / Build	7m 2s
Docker Tests In GO (basics)	59s
Docker Tests (basics)	1m 2s
E2E Tests (startup)	9m 37s
Docker Tests (bootstraptoken)	44s
Docker Tests In GO (bootstraptoken)	52s
E2E Tests (s3)	8m 4s
Docker Tests (cacerts)	49s
Docker Tests In GO (cacerts)	53s
E2E Tests (btrfs)	4m 17s
Docker Tests (compat)	2m 24s
Docker Tests In GO (etcd)	1m 58s
E2E Tests (externalip)	5m 5s
Docker Tests (lazypull)	51s
Docker Tests In GO (lazypull)	53s
Docker Tests (upgrade)	2m 23s
E2E Tests (privateregistry)	5m 44s
Docker Tests In GO (skew)	1m 39s
E2E Tests (embeddedmirror)	5m 39s
Docker Tests In GO (upgrade)	1m 17s
E2E Tests (wasm)	4m 35s
	1h 7m 44s

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