CLN: Fix exception causes in datetimelike.py

Author: cool-RR

pandas/core/arrays/datetimelike.py

@@ -775,8 +775,9 @@ def searchsorted(self, value, side="left", sorter=None):
         if isinstance(value, str):
             try:
                 value = self._scalar_from_string(value)
-            except ValueError:
-                raise TypeError("searchsorted requires compatible dtype or scalar")
+            except ValueError as e:
+                raise TypeError("searchsorted requires compatible "
+                                "dtype or scalar") from e
 
         elif is_valid_nat_for_dtype(value, self.dtype):
             value = NaT
@@ -1039,7 +1040,7 @@ def _validate_frequency(cls, index, freq, **kwargs):
             raise ValueError(
                 f"Inferred frequency {inferred} from passed values "
                 f"does not conform to passed frequency {freq.freqstr}"
-            )
+            ) from e
 
     # monotonicity/uniqueness properties are called via frequencies.infer_freq,
     #  see GH#23789