Close #1044: Add HTTP authentication method "API key" that does not prefix the key with the word "Token"

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
15.5% Coverage on New Code (required ≥ 80%)

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[TheSomeMan]

Thanks, please also update the docs with an example

Yes, I've updated the documentation.

[TheSomeMan]

@markoaamunkajo to test this, you can run the script ./ruuvi.gwui.html/scripts/http_server_auth.py, configure the gateway to send data to your computer 'http://:8000/record' and check HTTP header "Authorization" in the script console.

Firmware: https://github.com/ruuvi/ruuvi.gateway_esp.c/actions/runs/8999375063

[markoaamunkajo]

QA passed