[clang] [clang][CodeComplete] Omit ExplicitObject when completing code (PR #92743)

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zyctree wrote:

@kadircet ok, i added a test in [clang/test/CodeCompletion/member-access.cpp](https://github.com/llvm/llvm-project/pull/92743/files#diff-cf5f20cb8625bb041565f64089a94ed2b89363464b1c55ba31730fe6bf4a9c4f)

https://github.com/llvm/llvm-project/pull/92743