[clang] [clang][analyzer] Print empty per-EP metrics as empty CSV cells, fix missing PathRunningTime metric (PR #162839)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- clang/lib/StaticAnalyzer/Checkers/UnsignedStatTesterChecker.cpp clang/include/clang/StaticAnalyzer/Core/PathSensitive/EntryPointStats.h clang/lib/StaticAnalyzer/Core/EntryPointStats.cpp clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp clang/test/Analysis/analyzer-stats/entry-point-stats.cpp
``````````

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``````````diff
diff --git a/clang/lib/StaticAnalyzer/Core/EntryPointStats.cpp b/clang/lib/StaticAnalyzer/Core/EntryPointStats.cpp
index 33f5ccf60..ce25b2365 100644
--- a/clang/lib/StaticAnalyzer/Core/EntryPointStats.cpp
+++ b/clang/lib/StaticAnalyzer/Core/EntryPointStats.cpp
@@ -120,8 +120,7 @@ UnsignedEPStat::UnsignedEPStat(llvm::StringLiteral Name)
   StatsRegistry->ExplicitlySetStats.push_back(this);
 }
 
-static std::vector<std::optional<unsigned>>
-consumeExplicitlySetStats() {
+static std::vector<std::optional<unsigned>> consumeExplicitlySetStats() {
   std::vector<std::optional<unsigned>> Result;
   Result.reserve(StatsRegistry->ExplicitlySetStats.size());
   for (auto *M : StatsRegistry->ExplicitlySetStats) {

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https://github.com/llvm/llvm-project/pull/162839