style: fix error [SIM108] - Use ternary operator instead of if-else-block.

Used Ruff (vscode and pre-commit) to:
- Black-compatible code formatting.
- fix all auto-fixable violations.
- isort-compatible import sorting.
- flake8-simplify manual fixes.

Signed-off-by: Paulo Vital <paulo.vital@ibm.com>

Author: pvital

src/instana/collector/helpers/base.py

@@ -36,10 +36,7 @@ def get_delta(self, source, previous, metric):
             src_metric = metric
             dst_metric = metric
 
-        if isinstance(source, dict):
-            new_value = source.get(src_metric, None)
-        else:
-            new_value = source
+        new_value = source.get(src_metric, None) if isinstance(source, dict) else source
 
         if previous[dst_metric] != new_value:
             return new_value
@@ -66,10 +63,7 @@ def apply_delta(self, source, previous, new, metric, with_snapshot):
             src_metric = metric
             dst_metric = metric
 
-        if isinstance(source, dict):
-            new_value = source.get(src_metric, None)
-        else:
-            new_value = source
+        new_value = source.get(src_metric, None) if isinstance(source, dict) else source
 
         previous_value = previous.get(dst_metric, 0)