Add tracing to BLE GAP (#14117)

* Add traces to GapImpl.cpp

* Add helpers and param logs

* Update GapImpl.cpp

* Move helpers to ble_trace_helpers.h

* Add traces to whitelist setter & getter functions

* Prepend parent dir. to ble_trace_helpers.h include line

* Resolve portability issue by using PRI* macro in place of %lu

* Add traces to PalGapImpl.cpp

* Complete PAL GAP traces

* Remove stray include

* Make 'echo' traces in PAL configurable

Some of the tr_info traces at the beginning of PAL functions  are duplicates ('echoes') of those in GAP functions. This commit enables including/excluding of these traces in mbed_app.json by writing 1/0, respectively to the MBED_CONF_CORDIO_TRACE_PAL_ECHOES config macro. The default is to exclude 'echo' traces.

* Add missing spaces in tr_info traces

* Clean-up param log for set_extended_advertising_parameters

* Remove "Failed: " from every tr_error trace

* Apply changes from PalGapImpl.cpp review

* Apply changes from GapImpl.cpp review

* Use binary for channel map trace

B0: ADVERTISING_CHANNEL_37
B1: ADVERTISING_CHANNEL_38
B2: ADVERTISING_CHANNEL_39

We're assuming that the user understands the above. This could be documented somewhere.

* Replace more %lu w/PRIu32

* Add tr_info to terminateSync for user call

* Make trace group for PAL traces BLDM

* Remove [PAL] prefix from every PAL trace

* Add trace to setPeripheralPrivacyConfiguration

* Make set scan params tr_info dependent on selected PHY

* Add trace to GAP events

* Other GAP events required traces

Author: Abbas Bracken Ziad