MLECO-3183: Refactoring application sources

Platform agnostic application sources are moved into application
api module with their own independent CMake projects.

Changes for MLECO-3080 also included - they create CMake projects
individial API's (again, platform agnostic) that dependent on the
common logic. The API for KWS_API "joint" API has been removed and
now the use case relies on individual KWS, and ASR API libraries.

Change-Id: I1f7748dc767abb3904634a04e0991b74ac7b756d
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>
diff --git a/source/use_case/inference_runner/usecase.cmake b/source/use_case/inference_runner/usecase.cmake
index 7d12120..c70be71 100644
--- a/source/use_case/inference_runner/usecase.cmake
+++ b/source/use_case/inference_runner/usecase.cmake
@@ -14,6 +14,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #----------------------------------------------------------------------------
+# Append the API to use for this use case
+list(APPEND ${use_case}_API_LIST "inference_runner")
 
 USER_OPTION(${use_case}_ACTIVATION_BUF_SZ "Activation buffer size for the chosen model"
     0x00200000