Added some test functions (#1358)

Signed-off-by: rz-wang <rzwang@umich.edu>

Author: rz-wang

xga/tools/clusters/LT.py

@@ -249,6 +249,9 @@ def luminosity_temperature_pipeline(sample_data: pd.DataFrame, start_aperture: Q
         print(temp_lum_rel.core_excised)
         print("Your choice of 'core_excised' matches the ScalingRelation.")
     else:
+        print(core_excised)
+        print(rad_temp_rel.core_excised)
+        print(temp_lum_rel.core_excised)
         raise TypeError("Mismatch: Your choice of 'core_excised' for iteration does not match the ScalingRelation.")
 
     # Trying to determine the targeted overdensity based on the name of the scaling relation y-axis label