[PGO][PGSO] Enable non-cold code size opts under non-partial-profile sample PGO.

[hjyamauchi]

Summary

Following up D78949.

[davidxl]

lgtm

llvm/lib/Transforms/Utils/SizeOpts.cpp

cl::desc("Apply the profile guided size optimizations only "
              "to cold code."));
 
 cl::opt<bool> PGSOColdCodeOnlyForInstrPGO(
     "pgso-cold-code-only-for-instr-pgo", cl::Hidden, cl::init(false),
     cl::desc("Apply the profile guided size optimizations only "
              "to cold code under instrumentation PGO."));
 
 cl::opt<bool> PGSOColdCodeOnlyForSamplePGO(
-    "pgso-cold-code-only-for-sample-pgo", cl::Hidden, cl::init(true),
+    "pgso-cold-code-only-for-sample-pgo", cl::Hidden, cl::init(false),
     cl::desc("Apply the profile guided size optimizations only "
              "to cold code under sample PGO."));
 
 cl::opt<bool> PGSOColdCodeOnlyForPartialSamplePGO(
     "pgso-cold-code-only-for-partial-sample-pgo", cl::Hidden, cl::init(true),
     cl::desc("Apply the profile guided size optimizations only "
              "to cold code under partial-profile sample PGO."));