and_exit cannot be overriden when using test subcommand

[edwintorok]

When using Alcotest.run ~and_exit:false the test will still call exit 0 when the test subcommand is used (all works fine when it runs automatically with the default command).
This is a problem because cleanup handlers registered with Fun.protect won't run.

To reproduce:

alcobug.zip

dune runtest
File "test/dune", line 2, characters 7-19:
2 |  (name test_alcobug)
           ^^^^^^^^^^^^
Testing `bug'.
This run has ID `NE0Z2SZ9'.

  [OK]          bug          0   Bug.

Test Successful in 0.000s. 1 test run.

[36185]: Code before Fun.protect

[36185]: at_exit

[36185]: exit called, but finally didn't run yet!

This is probably due to this line:

alcotest.1.9.1/src/alcotest-engine/cli.ml
133:        Config.User.term ~stdout ~stderr ~and_exit:true ~record_backtrace:true