Revert^2 "Remove support for Valgrind in ART."

- Disable test configuration art-gtest-valgrind64
  (art-gtest-valgrind32 was already disabled).
- Remove Makefile logic regarding testing with Valgrind.
- Remove occurrences of `TEST_DISABLED_FOR_MEMORY_TOOL_VALGRIND`.
- Replace occurrences of `TEST_DISABLED_FOR_MEMORY_TOOL_ASAN` with
  `TEST_DISABLED_FOR_MEMORY_TOOL`.
- Replace the potentially dynamically evaluated
  `RUNNING_ON_MEMORY_TOOL` expression with constant
  `kRunningOnMemoryTool`.
- Simplify and fold the logic of
  `art::ArenaAllocatorMemoryToolCheckImpl` and
  `art::ArenaAllocatorMemoryToolCheck` into
  `art::ArenaAllocatorMemoryTool`.
- Adjust comments regarding memory tools.
- Remove Valgrind suppression files.
- Remove `--callgrind` option from tools/art.

This reverts commit 8b362a87d52a6668ffd2283ef6ffc274315f41c8.

Change-Id: I23c76845e6ccf766f19b22b58a0d5161f60842a9
Test: art/test.py
Test: art/test/testrunner/run_build_test_target.py art-asan
Bug: 77856586
Bug: 29282211
diff --git a/compiler/optimizing/instruction_simplifier.cc b/compiler/optimizing/instruction_simplifier.cc
index 63704a4..d532eee 100644
--- a/compiler/optimizing/instruction_simplifier.cc
+++ b/compiler/optimizing/instruction_simplifier.cc
@@ -637,8 +637,8 @@
     return;
   }
 
-  // Note: The `outcome` is initialized to please valgrind - the compiler can reorder
-  // the return value check with the `outcome` check, b/27651442 .
+  // Historical note: The `outcome` was initialized to please Valgrind - the compiler can reorder
+  // the return value check with the `outcome` check, b/27651442.
   bool outcome = false;
   if (TypeCheckHasKnownOutcome(check_cast->GetTargetClassRTI(), object, &outcome)) {
     if (outcome) {
@@ -683,8 +683,8 @@
     return;
   }
 
-  // Note: The `outcome` is initialized to please valgrind - the compiler can reorder
-  // the return value check with the `outcome` check, b/27651442 .
+  // Historical note: The `outcome` was initialized to please Valgrind - the compiler can reorder
+  // the return value check with the `outcome` check, b/27651442.
   bool outcome = false;
   if (TypeCheckHasKnownOutcome(instruction->GetTargetClassRTI(), object, &outcome)) {
     MaybeRecordStat(stats_, MethodCompilationStat::kRemovedInstanceOf);