[Bug][move-compiler-v2] e2e-test outputs show raw tmp filenames

[brmataptos]

🐛 Bug

Running e2e-test shows outputs like

% UB=1 cargo test -p e2e-move-tests -- test_view_attribute_with_mut_ref_signer
    Finished test [unoptimized + debuginfo] target(s) in 1.05s
     Running unittests src/lib.rs (target/debug/deps/e2e_move_tests-2c6837022352eac4)

running 1 test
BUILDING Package
error: type `&mut signer` is not supported as a parameter type
  ┌─ /var/folders/hx/_s_6fyh529bgmvl6z4m8m9fm0000gn/T/.tmpKAoAqz/sources/m.move:4:17
  │
4 │             fun view(_:&mut signer,value: u64): u64 { value }
  │                 ^^^^

error: view function cannot use the & signer paremter
  ┌─ /var/folders/hx/_s_6fyh529bgmvl6z4m8m9fm0000gn/T/.tmpKAoAqz/sources/m.move:4:17
  │
4 │             fun view(_:&mut signer,value: u64): u64 { value }
  │                 ^^^^

test tests::attributes::test_view_attribute_with_mut_ref_signer - should panic ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 181 filtered out; finished in 2.53s

which will change with every run and thus make tests not literally reproducible.

While we don't currently look at test outputs in detail, it may be useful to compare outputs to check error messages, etc.