[clang] [libclang/python] Add isFunctionInlined support (PR #162882)

[Thomas Applencourt via cfe-commits]

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@@ -2362,6 +2362,14 @@ def get_bitfield_width(self) -> int:
         """
         return conf.lib.clang_getFieldDeclBitWidth(self)  # type: ignore [no-any-return]
 
+    @cursor_null_guard
+    def is_function_inlined(self) -> bool:
+        """
+        Check if the function is inlined
+        """
+        assert self.kind == TypeKind.FUNCTIONPROTO
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TApplencourt wrote:

Not really. It will return `False` if not used in `FUNCTIONPROTO` (will not segfault :) )  

I was following the `is_function_variadic` assert. 
Can remove the `assert` if you prefers

https://github.com/llvm/llvm-project/pull/162882