[TF-M] Deprecate 'partitions/audit_logging' and its related tests

Hi,

The component name under this folder is 'Audit logging', and:

* There is no explicit specification or requirements for it, and its functionality is as a simple log collector (and looks no one is using it). * It supported under the library model only. And it is meaningless to move to IPC because of this. * It costs extra maintenance effort in test cases and partition code.

So a plan is to deprecate this folder and its related test cases; will create a new one when the specification or requirements are explicitly defined.

Question here is: Anyone is using this service? Or any doubts about depreciating it?

Will collect the response and broadcast it at 25th Jun.

Thanks.

/Ken