[v9] Fixes potential cgo.Handle panic

[ibeckermayer]

Backport #13479 to branch/v9

[ibeckermayer]

Note to self: Once this is merged, cherry-pick its merge commit to the top of the isaiah/backports-branch/v9 branch, and change

teleport/lib/srv/desktop/rdp/rdpclient/client.go

Line 460 in 64b75b8

if err := cgoError(C.close_rdp(c.rustClient)); err != nil {

to

teleport/lib/srv/desktop/rdp/rdpclient/client.go

Line 525 in 14ebab8

if err := C.close_rdp(c.rustClient); err != C.ErrCodeSuccess {

to backport #11616, #11714, and #12499