[Interpreter] Always show misattributed samples in linux_perf_report.py

Misattributed samples are strictly related to handlers, and the size
of this special group helps understand how accurate the profile is.
For these reasons, it makes more sense to always show this group.

LOG=N
BUG=v8:4899

Review URL: https://codereview.chromium.org/1895793002

Cr-Commit-Position: refs/heads/master@{#35585}

tools/ignition/linux_perf_report.py

@@ -115,7 +115,7 @@ def collapsed_callchains_generator(perf_stream, show_all=False,
     elif symbol == "Builtin:InterpreterEntryTrampoline":
       if len(current_chain) == 1:
         yield ["[entry trampoline]"]
-      elif show_all:
+      else:
         # If we see an InterpreterEntryTrampoline which is not at the top of the
         # chain and doesn't have a BytecodeHandler above it, then we have
         # skipped the top BytecodeHandler due to the top-level stub not building