Fix GH-9945: Reject shmop/sysvshm keys outside key_t range

[LamentXU123]

Now, shmop_open() and shm_attach() accepted zend_long keys and passed them directly to SysV shared memory APIs, where they may be truncated to key_t.

Generally we should throw ValurErrors on those issues. Fixes #9945

[Girgias]

Ideally a better error message would be possible, but this is at least something :)

[LamentXU123]

@Girgias Lets see if this message would be better :)

shm_attach(): Argument #1 ($key) must be representable as key_t

[Girgias]

@Girgias Lets see if this message would be better :)

shm_attach(): Argument #1 ($key) must be representable as key_t

I don't think so, as end-users won't have any idea what that is. So keeping a generic message of out of range is probably better.

[LamentXU123]

Fair :)