[TF-M] Remove some platform specific test cases

Hi all,

We are going to remove some test cases in tfm_core_test. They are:

* TFM_INTERACTIVE_TEST * TFM_PERIPH_ACCESS_TEST

The main reasons is that these peripheral and interactive test cases are mainly platform specific(button and LEDs), rather than test the main features and secure functionalities of TF-M. Besides, it also a burden for flatform owner to support and maintain those test cases.

Do you have any concerns for remove those test cases?

Best Regards, Shawn