ci(system): Restrict ULP test apps being built and run on CI

This commit updates the dependency list of the ULP test apps. These test
apps will now only build and run when the ULP component is updated.

components/ulp/test_apps/.build-test-rules.yml

@@ -3,10 +3,17 @@
 components/ulp/test_apps/lp_core:
   disable:
     - if: SOC_LP_CORE_SUPPORTED != 1
+  depends_components:
+    - ulp
+
 components/ulp/test_apps/ulp_fsm:
   enable:
     - if: SOC_ULP_FSM_SUPPORTED == 1
+  depends_components:
+    - ulp
 
 components/ulp/test_apps/ulp_riscv:
   disable:
     - if: SOC_RISCV_COPROC_SUPPORTED != 1
+  depends_components:
+    - ulp