community[minor]: Add Datahareld tool (#19680)

**Description:** Integrate [dataherald](https://www.dataherald.com)
tool, It is a natural language-to-SQL tool.
**Dependencies:** Install dataherald sdk to use it,
```
pip install dataherald
```

---------

Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>
Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: Christophe Bornet <cbornet@hotmail.com>

libs/community/tests/integration_tests/utilities/test_dataherald_api.py

@@ -0,0 +1,9 @@
+"""Integration test for Dataherald API Wrapper."""
+from langchain_community.utilities.dataherald import DataheraldAPIWrapper
+
+
+def test_call() -> None:
+    """Test that call gives the correct answer."""
+    search = DataheraldAPIWrapper(db_connection_id="65fb766367dd22c99ce1a12d")
+    output = search.run("How many employees are in the company?")
+    assert "Answer: SELECT \n    COUNT(*) FROM \n    employees" in output

libs/community/tests/unit_tests/tools/test_imports.py

@@ -36,6 +36,7 @@ EXPECTED_ALL = [
     "ConneryAction",
     "CopyFileTool",
     "CurrentWebPageTool",
+    "DataheraldTextToSQL",
     "DeleteFileTool",
     "DuckDuckGoSearchResults",
     "DuckDuckGoSearchRun",

libs/community/tests/unit_tests/tools/test_public_api.py

@@ -37,6 +37,7 @@ _EXPECTED = [
     "ConneryAction",
     "CopyFileTool",
     "CurrentWebPageTool",
+    "DataheraldTextToSQL",
     "DeleteFileTool",
     "DuckDuckGoSearchResults",
     "DuckDuckGoSearchRun",

libs/community/tests/unit_tests/utilities/test_imports.py

@@ -8,6 +8,7 @@ EXPECTED_ALL = [
     "BibtexparserWrapper",
     "BingSearchAPIWrapper",
     "BraveSearchWrapper",
+    "DataheraldAPIWrapper",
     "DuckDuckGoSearchAPIWrapper",
     "DriaAPIWrapper",
     "GoldenQueryAPIWrapper",