[clang-tools-extra] [clang-tidy] Added Conflicting Global Accesses checker (PR #130421)

[Baranov Victor via cfe-commits]

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+.. title:: clang-tidy - bugprone-conflicting-global-accesses
+
+bugprone-conflicting-global-accesses
+====================================
+
+Finds conflicting accesses on global variables.
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vbvictor wrote:

"conflicting" may not be very meaningful in this description, maybe use "unsequenced" just as in compiler flag?

https://github.com/llvm/llvm-project/pull/130421