PR CI integration tests fail `chat - run_in_terminal cannot write to /tmp`

[aeschli]

https://github.com/microsoft/vscode/actions/runs/24443710376/job/71414664603?pr=310092

1) chat - run_in_terminal
       sandbox on
         cannot write to /tmp:

      AssertionError [ERR_ASSERTION] [ERR_ASSERTION]: Unexpected output: "Note: The tool simplified the command to ` env TMPDIR=\"/Users/runner/.vscode-oss-dev/tmp/tmp_vscode_1\" '/bin/bash' -c 'echo \"SANDBOX_TMP_1776241544767\" > /tmp/SANDBOX_TMP_1776241544767.txt && cat /tmp/SANDBOX_TMP_1776241544767.txt && rm /tmp/SANDBOX_TMP_1776241544767.txt'`, and this is the output of running that command instead:\n\n\nCommand produced no output"
      + expected - actual

      -false
      +true
      
      at Context.<anonymous> (extensions/vscode-api-tests/src/singlefolder-tests/chat.runInTerminal.test.ts:370:11)