[lldb][test] TestTemplateDiagnosticHint.py: XFAIL on Windows

Fails on Windows with below error. Probably because we're not
constructing the AST from DWARF correctly for templates. Or perhaps
something to do with the DWARF index.

```
******************** TEST 'lldb-api :: lang/cpp/template-diagnostic-hint/TestTemplateDiagnosticHint.py' FAILED ********************
Script:
--
C:/Users/tcwg/scoop/apps/python/current/python.exe C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/llvm-project/lldb\test\API\dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./lib --env LLVM_INCLUDE_DIR=C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/include --env LLVM_TOOLS_DIR=C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin --arch aarch64 --build-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/lldb-test-build.noindex --lldb-module-cache-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/lldb-test-build.noindex/module-cache-lldb\lldb-api --clang-module-cache-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/lldb-test-build.noindex/module-cache-clang\lldb-api --executable C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin/lldb.exe --compiler C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin/clang.exe --dsymutil C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin/dsymutil.exe --make C:/Users/tcwg/scoop/shims/make.exe --llvm-tools-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin --lldb-obj-root C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/tools/lldb --lldb-libs-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./lib --cmake-build-type Release --skip-category=watchpoint C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\API\lang\cpp\template-diagnostic-hint -p TestTemplateDiagnosticHint.py
--
Exit Code: 1

Command Output (stdout):
--
lldb version 23.0.0git (https://github.com/llvm/llvm-project.git revision 4afce0c)
  clang revision 4afce0c
  llvm revision 4afce0c
Skipping the following test categories: watchpoint, libc++, libstdcxx, dwo, dsym, gmodules, debugserver, objc, fork, pexpect
--
Command Output (stderr):
--
UNSUPPORTED: LLDB (C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe-aarch64) :: test_dsym (TestTemplateDiagnosticHint.TestCase.test_dsym) (test case does not fall in any category of interest for this run)
FAIL: LLDB (C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe-aarch64) :: test_dwarf (TestTemplateDiagnosticHint.TestCase.test_dwarf)
UNSUPPORTED: LLDB (C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe-aarch64) :: test_dwo (TestTemplateDiagnosticHint.TestCase.test_dwo) (test case does not fall in any category of interest for this run)
======================================================================

FAIL: test_dwarf (TestTemplateDiagnosticHint.TestCase.test_dwarf)

----------------------------------------------------------------------

Traceback (most recent call last):
  File "C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\packages\Python\lldbsuite\test\lldbtest.py", line 1844, in test_method
    return attrvalue(self)

           ^^^^^^^^^^^^^^^
  File "C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\API\lang\cpp\template-diagnostic-hint\TestTemplateDiagnosticHint.py", line 14, in test
    self.expect(
  File "C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\packages\Python\lldbsuite\test\lldbtest.py", line 2569, in expect
    self.fail(log_msg)
AssertionError: Ran command:

"expression some_template_func<int, long>(5)"

Got output:

note: Ran expression as 'C++14'.

error: <user expression 0>:1:1: use of undeclared identifier 'some_template_func'

    1 | some_template_func<int, long>(5)

      | ^~~~~~~~~~~~~~~~~~

Expecting sub string: "does not name a template but is followed by template arguments" (was not found)

Config=aarch64-C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe

----------------------------------------------------------------------

Ran 3 tests in 0.601s
FAILED (failures=1, skipped=2)
```

Author: Michael137

lldb/test/API/lang/cpp/template-diagnostic-hint/TestTemplateDiagnosticHint.py

@@ -5,6 +5,7 @@
 
 
 class TestCase(TestBase):
+    @expectedFailureWindows
     def test(self):
         self.build()
         (_, process, _, _) = lldbutil.run_to_source_breakpoint(