[lldb][test] Skip TestCppFloatingTypesSpecialization.py on older compilers

Fails with:
```
08:19:28  /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/clang_1501_build/bin/clang++  -std=c++11 -g -O0 -isysroot "/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk" -arch arm64  -I/Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/packages/Python/lldbsuite/test/make/../../../../..//include -I/Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/lldb-build/tools/lldb/include -I/Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/test/API/lang/cpp/floating-types-specialization -I/Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/packages/Python/lldbsuite/test/make -include /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/packages/Python/lldbsuite/test/make/test_common.h  -fno-limit-debug-info    -nostdlib++ -nostdinc++ -cxx-isystem /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/clang_1501_build/include/c++/v1/  --driver-mode=g++ -MT main.o -MD -MP -MF main.d -c -o main.o /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/test/API/lang/cpp/floating-types-specialization/main.cpp
08:19:28  /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/test/API/lang/cpp/floating-types-specialization/main.cpp:3:24: error: __bf16 is not supported on this target
08:19:28  template <> struct Foo<__bf16> {};
08:19:28                         ^
08:19:28  /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/test/API/lang/cpp/floating-types-specialization/main.cpp:5:40: error: __bf16 is not supported on this target
08:19:28  template <> struct Foo<_Float16> : Foo<__bf16> {};
08:19:28                                         ^
08:19:28  /Users/ec2-user/jenkins/workspace/llvm.org/lldb-cmake-matrix/llvm-project/lldb/test/API/lang/cpp/floating-types-specialization/main.cpp:8:7: error: __bf16 is not supported on this target
08:19:28    Foo<__bf16> f0;
08:19:28        ^
08:19:28  3 errors generated.
08:19:28  make: *** [main.o] Error 1
```

On our Clang-15.0 CI.

Author: Michael137

lldb/test/API/lang/cpp/floating-types-specialization/TestCppFloatingTypesSpecialization.py

@@ -6,6 +6,7 @@
 
 
 class TestCase(TestBase):
+    @skipIf(compiler="clang", compiler_version=["<", "17.0"])
     def test(self):
         self.build()
         lldbutil.run_to_source_breakpoint(