[BUG] exec command does not return shell prompt

[mbl-35]

Need to hit CTRL-C to exit the remote command..

[mbl-35]

• connexion: ok

  PS1> wslctl exec ubuntu-20.04.3
  root@host:/mnt/c/# exit
  PS1>

• simple command : ok

  PS1> wslctl exec ubuntu-20.04.3 echo "toto"
  Execute command 'echo toto' on ubuntu-20.04.3-bps ...
  toto
  PS1>

• simple command with error : ok

  PS1> wslctl exec ubuntu-20.04.3 exit 1
  Execute command 'exit 1' on ubuntu-20.04.3 ...
  Error: Command result with errors
  PS1> $LastExitCode
  1

• file with exit 0: ok

  PS1> wslctl exec ubuntu-20.04.3 .\tests\test-called-script.sh
  Execute test-called-script.sh on ubuntu-20.04.3 ...
  SCRIPT_WINPATH=/mnt/c/wslctl/tests/test-called-script.sh
  hello from script file !
  PS1> $LastExitCode
  0

• same file without exit 0: ok

  PS1> wslctl exec ubuntu-20.04.3 .\tests\test-called-script.sh
  Execute test-called-script.sh on ubuntu-20.04.3 ...
  SCRIPT_WINPATH=/mnt/c/wslctl/tests/test-called-script.sh
  hello from script file !
  PS1> $LastExitCode
  0

• same file without exit 1: ok

  PS1> wslctl exec ubuntu-20.04.3 .\tests\test-called-script.sh
  Execute test-called-script.sh on ubuntu-20.04.3 ...
  SCRIPT_WINPATH=/mnt/c/wslctl/tests/test-called-script.sh
  hello from script file !
  Error: Command result with errors
  PS1> $LastExitCode
  1

NOT REPRODUCED FOR NOW ...