revert viper version to v1.4.0 (#5626)

* revert viper version to v1.4.0

Signed-off-by: wenhaozhou <wenhaozhou@yunify.com>

* update vendor

Signed-off-by: wenhaozhou <wenhaozhou@yunify.com>

---------

Signed-off-by: wenhaozhou <wenhaozhou@yunify.com>

vendor/github.com/pelletier/go-toml/v2/internal/tracker/key.go

@@ -1,50 +0,0 @@
-package tracker
-
-import (
-	"github.com/pelletier/go-toml/v2/internal/ast"
-)
-
-// KeyTracker is a tracker that keeps track of the current Key as the AST is
-// walked.
-type KeyTracker struct {
-	k []string
-}
-
-// UpdateTable sets the state of the tracker with the AST table node.
-func (t *KeyTracker) UpdateTable(node *ast.Node) {
-	t.reset()
-	t.Push(node)
-}
-
-// UpdateArrayTable sets the state of the tracker with the AST array table node.
-func (t *KeyTracker) UpdateArrayTable(node *ast.Node) {
-	t.reset()
-	t.Push(node)
-}
-
-// Push the given key on the stack.
-func (t *KeyTracker) Push(node *ast.Node) {
-	it := node.Key()
-	for it.Next() {
-		t.k = append(t.k, string(it.Node().Data))
-	}
-}
-
-// Pop key from stack.
-func (t *KeyTracker) Pop(node *ast.Node) {
-	it := node.Key()
-	for it.Next() {
-		t.k = t.k[:len(t.k)-1]
-	}
-}
-
-// Key returns the current key
-func (t *KeyTracker) Key() []string {
-	k := make([]string, len(t.k))
-	copy(k, t.k)
-	return k
-}
-
-func (t *KeyTracker) reset() {
-	t.k = t.k[:0]
-}