Fix TMPDIR usage #2979

Job	Run time
sequentialise	2s
fmt	1m 49s
set-condition	9s
parachain-build-dev	1m 43s
parachain-build-tee-prod	2m 10s
tee-build	3m 7s
parachain-clippy	0s
tee-clippy	0s
parachain-unit-test	0s
parachain-runtime-test	0s
parachain-ts-test (litmus)	17s
parachain-ts-test (litentry)	22s
parachain-ts-test (rococo)	21s
tee-test (demo-indirect-invocation)	2m 0s
tee-test (demo-direct-call)	1m 46s
tee-test (lit-user-shielding-key)	1m 46s
tee-test (lit-resume-worker)	1m 59s
tee-test (lit-set-heartbeat-timeout)	2m 1s
tee-test (lit-ii-vc-test)	2m 13s
tee-test (lit-ii-identity-test)	2m 11s
tee-test (lit-di-substrate-identity-test)	2m 12s
tee-test (lit-di-evm-identity-test)	1m 53s
tee-test (lit-di-vc-test)	1m 59s
tee-test (lit-parentchain-nonce)	1m 56s
tee-test (lit-ii-batch-test)	2m 6s
tee-test (lit-test-stress-script)	2m 11s
push-docker	0s
	36m 13s

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