⚡️ Rework warnings in mgm-hurry

[Rikj000]

Some of the warnings thrown in mgm-hurry are unneeded to be thrown.

• 🔳 When installing Freqtrade initially & no installation is present yet:

  • WARNING - Could not find .hurry config file at /mnt/Windows/Users/Rik/Desktop/Rikj-Home/Projects/temp/freqtrade-mgm/.hurry
    INFO - 🍺 Configuration data written to ".hurry" file
    WARNING - FreqtradeCli - installation_exists() failed. Freqtrade binary not found in /mnt/Windows/Users/Rik/Desktop/Rikj-Home/Projects/temp/freqtrade-mgm/.env/bin/freqtrade.
    WARNING - 🤷 No Freqtrade installation found. Please run "mgm-hurry install_freqtrade" before attempting to go further!
    INFO - 💨 💨 💨
           👉 The all in one command. Hurry up, turn it up!
           💨 💨 💨
    ? 💨 Do you want to install Freqtrade? (y/N)

• ☑️ File not always present, should only be thrown once (in-code comment points where in the code):
  • WARNING - 🤷 No "{installdir}/user_data/mgm-config-hyperopt.json" file found in the "user_data" directory. Please run: mgm-hurry setup
  • in-code: mgm-hurry - sys.exit(1) # Warning should already be thrown when loading the config files

[Rikj000]

🔳 Rewrite following warning:

WARNING - No history data for pair: "XXX/XXX", timeframe XX. Use `freqtrade download-data` to download the data

To:

WARNING - No history data for pair: "XXX/XXX", timeframe XX. Use `mgm-hurry download_candle_data` to download the data