Rename PgLTree::from to from_labels and add From<Vec<PgLTreeLabel>> implementation (#3949)

Author: JerryQ17

sqlx-postgres/src/types/ltree.rs

@@ -96,7 +96,7 @@ impl PgLTree {
     }
 
     /// creates ltree from a [`Vec<PgLTreeLabel>`]
-    pub fn from(labels: Vec<PgLTreeLabel>) -> Self {
+    pub fn from_labels(labels: Vec<PgLTreeLabel>) -> Self {
         Self { labels }
     }
 
@@ -138,6 +138,12 @@ impl PgLTree {
     }
 }
 
+impl From<Vec<PgLTreeLabel>> for PgLTree {
+    fn from(labels: Vec<PgLTreeLabel>) -> Self {
+        Self { labels }
+    }
+}
+
 impl FromIterator<PgLTreeLabel> for PgLTree {
     fn from_iter<T: IntoIterator<Item = PgLTreeLabel>>(iter: T) -> Self {
         Self {