Firmware release process update

[obrusvit]

This issue is a counterpart to trezor/trezor-suite#19763

Implement the new release process, see Notion

• incorporate uploading the unsigned/signed binaries into a new repo
• make changes to the release_json.py file
• update Release checklist template in Notion

[obrusvit]

• The new release process is reflected in the tasklist template in Notion
• a new generator for the releases JSONs was developed: https://github.com/trezor/trezor-suite-firmware-release/pull/