Patch release for ESP32 native USB support This is a patch release containing the following commits: - esp32: update esp_tinyusb component to v1.7.6 - tools: add an environment variable MICROPY_MAINTAINER_BUILD - esp32: add IDF Component Lockfiles to git repo - shared/tinyusb: fix hang from new tx_overwritabe_if_not_connected flag - shared/tinyusb/mp_usbd_cdc: rewrite USB CDC TX loop - tools/mpremote: don't apply Espressif DTR/RTS quirk to TinyUSB CDC dev