Increase the size of the kernel FD table

With packagefs potentially opening quite a few packages the default of
256 slots is a bit tight. It's 4096 now, which should be safe for a
while, but we might want to consider resizing the table dynamically and
probably even switching to another algorithm for allocating the slots.

Should fix #11328.

src/system/kernel/team.cpp

@@ -2793,6 +2793,9 @@ team_init(kernel_args* args)
 	if (sKernelTeam->io_context == NULL)
 		panic("could not create io_context for kernel team!\n");
 
+	if (vfs_resize_fd_table(sKernelTeam->io_context, 4096) != B_OK)
+		dprintf("Failed to resize FD table for kernel team!\n");
+
 	// stick it in the team hash
 	sTeamHash.Insert(sKernelTeam);