bluetooth: controller: update unittests for LLCP to use proper ZTEST API

Update unittests for the following areas/controll procedures
- API
- collision handling
- invalid PDUs
- unsupported procedures
- buffer allocation
- TX queue
- Data Length Update
- PHY update
- Encryption
- Ping
- Version
- Channel map update
- Min. used channels
- Connection update
- SCA
- Terminate connection
- CTE request
- CIS create
- CIS terminate

Also moved the internal API tests from the ull_llcp* files
to the proper unittest C-file

Unused files  are removed

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>

tests/bluetooth/controller/ctrl_conn_update/prj.conf

@@ -0,0 +1,33 @@
+CONFIG_ZTEST=y
+CONFIG_ZTEST_NEW_API=y
+
+CONFIG_ASSERT=y
+CONFIG_ASSERT_LEVEL=2
+CONFIG_ASSERT_VERBOSE=y
+
+
+CONFIG_BT=y
+CONFIG_BT_HCI=y
+CONFIG_BT_CTLR=y
+CONFIG_BT_LL_SW_SPLIT=y
+CONFIG_BT_MAX_CONN=4
+CONFIG_BT_LLL_VENDOR_NORDIC=y
+
+CONFIG_BT_CENTRAL=y
+CONFIG_BT_PERIPHERAL=y
+CONFIG_BT_CTLR_PERIPHERAL_ISO=y
+CONFIG_BT_CTLR_CENTRAL_ISO=y
+CONFIG_BT_CTLR_CONN_PARAM_REQ=y
+CONFIG_BT_CTLR_ADVANCED_FEATURES=y
+CONFIG_BT_CTLR_USER_EXT=y
+CONFIG_BT_CTLR_USER_CPR_ANCHOR_POINT_MOVE=n
+CONFIG_BT_ASSERT=y
+CONFIG_BT_CTLR_ASSERT_HANDLER=y
+
+CONFIG_BT_CTLR_PER_INIT_FEAT_XCHG=y
+CONFIG_BT_CTLR_SCA_UPDATE=y
+CONFIG_BT_SCA_UPDATE=y
+
+CONFIG_BT_PHY_UPDATE=y
+CONFIG_BT_CTLR_PHY_2M=y
+CONFIG_BT_CTLR_PHY_CODED=y