It's not possible for user to setup connection to local UTBot server without SFTP plugin

[tyuldashev]

Description
Wizard doesn't allow to procced without SFTP and SARIF plugin installation, but SFTP should not be required in case user wants to connect to locally installed WSL server

To Reproduce
Steps to reproduce the behavior:

1. Disable SFTP plugin if it's installed
2. Start UTBot: QuickStart wizard
3. Try to click 'Next' button to continue server configuration

Expected behavior
Server configuration page opened and user set ups connection to local server. There could be warning on next page or we could enable 'localhost' with message that SFTP is not available.

Actual behavior
User cannot continue configuration. Label against SFTP plugin says: "Please, install or enable the SFTP plugin and restart the wizard!"

Visual proofs (screenshots, logs)

Additional context
No sure if we should require SARIF plugin as we can generate tests without it, but at least we should not block wizard when there is no SFTP installed.