tailscale: update tailfs file and package names (#11590)

This change updates the tailfs file and package names to their new
naming convention.

Updates #tailscale/corp#16827

Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>

ipn/ipnlocal/local.go

@@ -43,6 +43,7 @@ import (
 	"tailscale.com/doctor/ethtool"
 	"tailscale.com/doctor/permissions"
 	"tailscale.com/doctor/routetable"
+	"tailscale.com/drive"
 	"tailscale.com/envknob"
 	"tailscale.com/health"
 	"tailscale.com/health/healthmsg"
@@ -69,7 +70,6 @@ import (
 	"tailscale.com/syncs"
 	"tailscale.com/tailcfg"
 	"tailscale.com/taildrop"
-	"tailscale.com/tailfs"
 	"tailscale.com/tka"
 	"tailscale.com/tsd"
 	"tailscale.com/tstime"
@@ -318,7 +318,7 @@ type LocalBackend struct {
 
 	// lastNotifiedTailFSShares keeps track of the last set of shares that we
 	// notified about.
-	lastNotifiedTailFSShares atomic.Pointer[views.SliceView[*tailfs.Share, tailfs.ShareView]]
+	lastNotifiedTailFSShares atomic.Pointer[views.SliceView[*drive.Share, drive.ShareView]]
 
 	// outgoingFiles keeps track of Taildrop outgoing files keyed to their OutgoingFile.ID
 	outgoingFiles map[string]*ipn.OutgoingFile
@@ -447,7 +447,7 @@ func NewLocalBackend(logf logger.Logf, logID logid.PublicID, sys *tsd.System, lo
 	if ok {
 		currentShares := b.pm.prefs.TailFSShares()
 		if currentShares.Len() > 0 {
-			var shares []*tailfs.Share
+			var shares []*drive.Share
 			for i := 0; i < currentShares.Len(); i++ {
 				shares = append(shares, currentShares.At(i).AsStruct())
 			}