[LifetimeSafety] Disable canonicalization in immutable collections (#159850)

Disable canonicalization in immutable collections for lifetime analysis.

Modified the `LifetimeFactory` struct in `LifetimeSafety.cpp` to
explicitly initialize the immutable collection factories with
`canonicalize=false`. This prevents the factories from canonicalizing
their data structures, which can improve performance by avoiding
unnecessary comparisons and digest computations.

Author: usx95

clang/lib/Analysis/LifetimeSafety.cpp

@@ -966,9 +966,11 @@ using ExpiredLoanMap = llvm::ImmutableMap<LoanID, const ExpireFact *>;
 /// An object to hold the factories for immutable collections, ensuring
 /// that all created states share the same underlying memory management.
 struct LifetimeFactory {
-  OriginLoanMap::Factory OriginMapFactory;
-  LoanSet::Factory LoanSetFactory;
-  ExpiredLoanMap::Factory ExpiredLoanMapFactory;
+  llvm::BumpPtrAllocator Allocator;
+  OriginLoanMap::Factory OriginMapFactory{Allocator, /*canonicalize=*/false};
+  LoanSet::Factory LoanSetFactory{Allocator, /*canonicalize=*/false};
+  ExpiredLoanMap::Factory ExpiredLoanMapFactory{Allocator,
+                                                /*canonicalize=*/false};
 };
 
 /// Represents the dataflow lattice for loan propagation.