Minor Tramp optimization

* lisp/net/tramp.el (tramp-skeleton-file-truename)
(tramp-skeleton-write-region, tramp-handle-file-truename):
* lisp/net/tramp-integration.el (tramp-eshell-directory-change)
(tramp-recentf-exclude-predicate):
* lisp/net/tramp-smb.el (tramp-smb-handle-copy-file):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-do-copy-or-rename-file):
Use `tramp-tramp-file-p' instead of `file-remote-p'.

lisp/net/tramp-integration.el

@@ -136,7 +136,7 @@ been set up by `rfn-eshadow-setup-minibuffer'."
   ;; Remove last element of `(exec-path)', which is `exec-directory'.
   ;; Use `path-separator' as it does eshell.
   (setq eshell-path-env
-        (if (file-remote-p default-directory)
+        (if (tramp-tramp-file-p default-directory)
             (string-join (butlast (exec-path)) path-separator)
           (getenv "PATH"))))
 
@@ -158,7 +158,7 @@ been set up by `rfn-eshadow-setup-minibuffer'."
 (defun tramp-recentf-exclude-predicate (name)
   "Predicate to exclude a remote file name from recentf.
 NAME must be equal to `tramp-current-connection'."
-  (when (file-remote-p name)
+  (when (tramp-tramp-file-p name)
     (tramp-file-name-equal-p
      (tramp-dissect-file-name name) (car tramp-current-connection))))
 

lisp/net/tramp-smb.el

@@ -618,7 +618,7 @@ PRESERVE-UID-GID and PRESERVE-EXTENDED-ATTRIBUTES are completely ignored."
       ;; with `jka-compr-handler', so we cannot trust its result as
       ;; indication for a remote file name.
       (if-let ((tmpfile
-		(and (file-remote-p filename) (file-local-copy filename))))
+		(and (tramp-tramp-file-p filename) (file-local-copy filename))))
 	  ;; Remote filename.
 	  (condition-case err
 	      (rename-file tmpfile newname ok-if-already-exists)

lisp/net/tramp-sudoedit.el

@@ -274,8 +274,8 @@ absolute file names."
 		     (not (directory-name-p newname)))
 	    (tramp-error v 'file-error "File is a directory %s" newname))
 
-	  (if (or (and (file-remote-p filename) (not t1))
-		  (and (file-remote-p newname)  (not t2)))
+	  (if (or (and (tramp-tramp-file-p filename) (not t1))
+		  (and (tramp-tramp-file-p newname)  (not t2)))
 	      ;; We cannot copy or rename directly.
 	      (let ((tmpfile (tramp-compat-make-temp-file filename)))
 		(if (eq op 'copy)
@@ -296,7 +296,7 @@ absolute file names."
 
 	  ;; When `newname' is local, we must change the ownership to
 	  ;; the local user.
-	  (unless (file-remote-p newname)
+	  (unless (tramp-tramp-file-p newname)
 	    (tramp-set-file-uid-gid
 	     (concat (file-remote-p filename) newname)
 	     (tramp-get-local-uid 'integer)

lisp/net/tramp.el

@@ -3447,7 +3447,7 @@ BODY is the backend specific code."
 	       "Apparent cycle of symbolic links for %s" ,filename))
 	    ;; If the resulting localname looks remote, we must quote
 	    ;; it for security reasons.
-	    (when (file-remote-p result)
+	    (when (tramp-tramp-file-p result)
 	      (setq result (file-name-quote result 'top)))
 	    result)))))))
 
@@ -3587,7 +3587,7 @@ BODY is the backend specific code."
 	   ;; Lock file.
 	   (when (and (not (auto-save-file-name-p
 			    (file-name-nondirectory filename)))
-		      (file-remote-p lockname)
+		      (tramp-tramp-file-p lockname)
 		      (not file-locked))
 	     (setq file-locked t)
 	     ;; `lock-file' exists since Emacs 28.1.
@@ -4117,7 +4117,7 @@ Let-bind it when necessary.")
 		  (< numchase numchase-limit))
 	(setq numchase (1+ numchase)
 	      result
-	      (if (file-remote-p symlink-target)
+	      (if (tramp-tramp-file-p symlink-target)
 		  (file-name-quote symlink-target 'top)
 		(tramp-drop-volume-letter
 		 (expand-file-name