[llvm] [Perf2bolt] Support multi-PID filtering for multiple perf inputs (PR #215541)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- bolt/lib/Profile/DataAggregator.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/bolt/lib/Profile/DataAggregator.cpp b/bolt/lib/Profile/DataAggregator.cpp
index 499821a36..b99557d22 100644
--- a/bolt/lib/Profile/DataAggregator.cpp
+++ b/bolt/lib/Profile/DataAggregator.cpp
@@ -85,11 +85,10 @@ static cl::opt<bool> ParseMemProfile(
     cl::init(true), cl::cat(AggregatorCategory));
 
 static cl::list<unsigned long long>
-FilterPID("pid",
-  cl::desc("only use samples from process with specified PID(s) (comma-separated)"),
-  cl::CommaSeparated,
-  cl::ZeroOrMore,
-  cl::cat(AggregatorCategory));
+    FilterPID("pid",
+              cl::desc("only use samples from process with specified PID(s) "
+                       "(comma-separated)"),
+              cl::CommaSeparated, cl::ZeroOrMore, cl::cat(AggregatorCategory));
 
 static cl::opt<bool> ImputeTraceFallthrough(
     "impute-trace-fall-through",

``````````

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https://github.com/llvm/llvm-project/pull/215541