Strip empty chars

Author: leandrodamascena

aws_lambda_powertools/metrics/provider/cloudwatch_emf/cloudwatch.py

@@ -273,6 +273,8 @@ def add_dimension(self, name: str, value: str) -> None:
                 f"Maximum number of dimensions exceeded ({MAX_DIMENSIONS}): Unable to add dimension {name}.",
             )
 
+        value = value if isinstance(value, str) else str(value)
+
         if not name.strip() or not value.strip():
             warnings.warn(
                 f"The dimension {name} doesn't meet the requirements and won't be added. "
@@ -283,7 +285,7 @@ def add_dimension(self, name: str, value: str) -> None:
             # Cast value to str according to EMF spec
             # Majority of values are expected to be string already, so
             # checking before casting improves performance in most cases
-            self.dimension_set[name] = value if isinstance(value, str) else str(value)
+            self.dimension_set[name] = value
 
     def add_metadata(self, key: str, value: Any) -> None:
         """Adds high cardinal metadata for metrics object