[lldb][test][win][x86_64] XFAIL already failing API tests

These test are passing locally on win x86_64 using the following
configuration (some options ellided for brevity)

CMAKE_C_COMPILER     clang-cl.exe
CMAKE_CXX_COMPILER   clang-cl.exe
CMAKE_BUILD_TYPE     Release
CMAKE_LINKER         lld-link.exe
LLVM_HOST_TRIPLE="x86_64-unknown-windows-msvc"
LLDB_TEST_USER_ARGS=--skip-category=watchpoint
LLDB_ENFORCE_STRICT_TEST_REQUIREMENTS=1

Author: kendal

lldb/test/API/functionalities/multiple-slides/TestMultipleSlides.py

@@ -12,6 +12,7 @@
 class MultipleSlidesTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
+    @expectedFailureAll(oslist=["windows"], archs=["x86_64"])
     def test_mulitple_slides(self):
         """Test that a binary can be slid multiple times correctly."""
         self.build()

lldb/test/API/lang/cpp/class-template-non-type-parameter-pack/TestClassTemplateNonTypeParameterPack.py

@@ -6,7 +6,7 @@
 
 class TestCaseClassTemplateNonTypeParameterPack(TestBase):
     @expectedFailureAll(
-        oslist=["windows"], archs=["i[3-6]86", "x86_64"]
+        oslist=["windows"], archs=["i[3-6]86"]
     )  # Fails to read memory from target.
     @no_debug_info_test
     def test(self):

lldb/test/API/lang/cpp/class-template-type-parameter-pack/TestClassTemplateTypeParameterPack.py

@@ -6,7 +6,7 @@
 
 class TestCaseClassTemplateTypeParameterPack(TestBase):
     @expectedFailureAll(
-        oslist=["windows"], archs=["i[3-6]86", "x86_64"]
+        oslist=["windows"], archs=["i[3-6]86"]
     )  # Fails to read memory from target.
     @no_debug_info_test
     def test(self):

lldb/test/API/python_api/thread/TestThreadAPI.py

@@ -52,6 +52,7 @@ def test_negative_indexing(self):
         self.build()
         self.validate_negative_indexing()
 
+    @expectedFailureAll(oslist=["windows"], archs=["x86_64"])
     def test_StepInstruction(self):
         """Test that StepInstruction preserves the plan stack."""
         self.build()