Add ESP BLE GATT server support

[tannewt]

Enable BLE where we can. Switch 4MB, non-USB board default partitioning over to a single 2MB firmware bank. Old boards override this setting to keep the same behavior.

This also adds alpha support for the ESP32-C2 (aka ESP8684).

Fixes #5926 and #7170

[tannewt]

Seems to work on S3. Connecting hangs on C6. C2 runs out of memory with wifi on. C3 is untested. ESP32 crashes with watchdog timeout. (EDIT: update, see below)

[tannewt]

This should be good to go!

[dhalbert]

Is this lib/tinyusb submodule change a regression? I thought it was bumped forward in another PR.

Just some other questions. I did not test. I will put the "this and that don't work" in the release notes. When this is merged, could you add issues addressing the ports that don't work? Thanks.

[tannewt]

Is this lib/tinyusb submodule change a regression? I thought it was bumped forward in another PR.

This bumps it further add definitions for the C2.

Just some other questions. I did not test. I will put the "this and that don't work" in the release notes. When this is merged, could you add issues addressing the ports that don't work? Thanks.

I'm not sure what you mean by this. I hope it all works but I expect folks to find issues.

[dhalbert]

I'm not sure what you mean by this. I hope it all works but I expect folks to find issues.

I meant what you said in the post above:

Connecting hangs on C6. C2 runs out of memory with wifi on. C3 is untested. ESP32 crashes with watchdog timeout.

C2 is not surprising. So C6 and ESP32 needs some fixing, and C3 needs to be tested.

[tannewt]

Ah! I think C6 and ESP32 are fixed.RAM may still be an issue but we'll see.