Really fixed the return direct

[Pingdred]

Description

The return direct should be really fixed now, when a tool having return_direct = True is used the execute_tool_agent return immediately and the tool output is showed in chat.

If multiple tools are used, the intermediate_steps are still shown in the why but in the chat only the output of the tool with return_direct is shown.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

[pieroit]

Thanks @Pingdred !

@cristianorevil issue about return_direct in develop is fixed, let us know ;)