Deprecate load/unload methods (#376)

* Deprecating load method

* Deprecating unload method

* Minor comment correction

Author: apetenchea

arango/backup.py

@@ -33,7 +33,7 @@ def get(self, backup_id: Optional[str] = None) -> Result[Json]:
         :type backup_id: str
         :return: Backup details.
         :rtype: dict
-        :raise arango.exceptions.BackupGetError: If delete fails.
+        :raise arango.exceptions.BackupGetError: If the operation fails.
         """
         request = Request(
             method="post",

arango/collection.py

@@ -537,10 +537,18 @@ def response_handler(resp: Response) -> Json:
     def load(self) -> Result[bool]:
         """Load the collection into memory.
 
+        .. note::
+            The load function is deprecated from version 3.8.0 onwards and is a
+            no-op from version 3.9.0 onwards. It should no longer be used, as it
+            may be removed in a future version of ArangoDB.
+
         :return: True if collection was loaded successfully.
         :rtype: bool
         :raise arango.exceptions.CollectionLoadError: If operation fails.
         """
+        m = "The load function is deprecated from version 3.8.0 onwards and is a no-op from version 3.9.0 onwards."  # noqa: E501
+        warn(m, DeprecationWarning, stacklevel=2)
+
         request = Request(method="put", endpoint=f"/_api/collection/{self.name}/load")
 
         def response_handler(resp: Response) -> bool:
@@ -553,10 +561,18 @@ def response_handler(resp: Response) -> bool:
     def unload(self) -> Result[bool]:
         """Unload the collection from memory.
 
+        .. note::
+            The unload function is deprecated from version 3.8.0 onwards and is a
+            no-op from version 3.9.0 onwards. It should no longer be used, as it
+            may be removed in a future version of ArangoDB.
+
         :return: True if collection was unloaded successfully.
         :rtype: bool
         :raise arango.exceptions.CollectionUnloadError: If operation fails.
         """
+        m = "The unload function is deprecated from version 3.8.0 onwards and is a no-op from version 3.9.0 onwards."  # noqa: E501
+        warn(m, DeprecationWarning, stacklevel=2)
+
         request = Request(method="put", endpoint=f"/_api/collection/{self.name}/unload")
 
         def response_handler(resp: Response) -> bool: