ESP32S3 UART output mode for Tx

[s-hadinger]

Description:

When configuring UART, the Tx GPIO is not automatically configured as OUTPUT. I'm not sure if the problem is only on ESP32S3, so I'm limiting to this chip for now.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.0.241030
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass