Check mount support multiple drives

[inqrphl]

change the argument to be an []string and adjust loops in the code relating to mount checks

check_mount: ai assisted , add tests for multiple mounts

PS C:\Users\sorus\repositories\snclient.worktrees\check-mount-support-multiple-drives> .\snclient.windows.amd64.exe -vvv --logfile stdout run check_mount show-all
OK - mount C: , mount D: , mount E: , mount F: , mount G: , mount H: , mount I:

PS C:\Users\sorus\repositories\snclient.worktrees\check-mount-support-multiple-drives> .\snclient.windows.amd64.exe -vvv --logfile stdout run check_mount mount=C: mount=D:
OK - 2 mount(s) as expected

PS C:\Users\sorus\repositories\snclient.worktrees\check-mount-support-multiple-drives> .\snclient.windows.amd64.exe -vvv --logfile stdout run check_mount mount=C: mount=D: mount=X: mount=Y:
CRITICAL - critical(mount X: not mounted, mount Y: not mounted)

~/repositories/snclient.worktrees/check-mount-support-multiple-drives$ ./snclient -vvv --logfile stdout run check_mount
OK - 3 mount(s) as expected

~/repositories/snclient.worktrees/check-mount-support-multiple-drives$ ./snclient -vvv --logfile stdout run check_mount mount=/ mount=/boot
OK - 2 mount(s) as expected

~/repositories/snclient.worktrees/check-mount-support-multiple-drives$  ./snclient -vvv --logfile stdout run check_mount mount=/ mount=/boot filter='device eq /dev/dm-0'
OK - 1 mount(s) as expected