boards: lilygo: ttgo_t7v1_5: Fix twister identifier

Due to a copy-paste error, it duplicated `ttgo_lora32/esp32/procpu`.
Also, remove the `lora` tag, as it seems to be omitted from devicetree.

Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>