ble_ota as a ble service (AEGHB-1396)

[acouvreur]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

The current ble_ota profile handle it's own advertisement mechanism.

I would like to request a ble_ota component that is compatible with the ble connection manager component.

[XionHsieh1025]

We will discuss it and then decide whether to support this requirement.