Add RAK WisMesh Tap V2 (ESP32S3) Hardware Variant (#7741)

* Add initial variant and platformio configuration for RAK WISMESHTAP V2

* Add initial variant and platformio configuration for rak wismesh tap v2

* Remove unnecessary Meshtastic build flags from rak_wismesh_tap_v2 configuration

* Enable LGFX button support in rak_wismesh_tap_v2 configuration

* Revert "Enable LGFX button support in rak_wismesh_tap_v2 configuration"

This reverts commit 2bd2c1a03b.

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Co-authored-by: Daniel.Cao <daniel.cao@rakwireless.com>
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