[clang-tools-extra] [NFC][clangd][test] add clang-tidy config to ensure test cases sandbox (PR #141410)

[Congcong Cai via cfe-commits]

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@@ -0,0 +1 @@
+InheritParentConfig: false
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HerrCai0907 wrote:

path-mapping will copy all folder to tmp folder. but i agree disable clangtidy is better

https://github.com/llvm/llvm-project/pull/141410