clang-tidy: add check for non-trivial thread_local vars

Do not allow thread_local vars with non-trivial destructors

contrib/devtools/bitcoin-tidy/nontrivial-threadlocal.h

@@ -0,0 +1,29 @@
+// Copyright (c) 2023 Bitcoin Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef NONTRIVIAL_THREADLOCAL_CHECK_H
+#define NONTRIVIAL_THREADLOCAL_CHECK_H
+
+#include <clang-tidy/ClangTidyCheck.h>
+
+namespace bitcoin {
+
+// Warn about any thread_local variable with a non-trivial destructor.
+class NonTrivialThreadLocal final : public clang::tidy::ClangTidyCheck
+{
+public:
+    NonTrivialThreadLocal(clang::StringRef Name, clang::tidy::ClangTidyContext* Context)
+        : clang::tidy::ClangTidyCheck(Name, Context) {}
+
+    bool isLanguageVersionSupported(const clang::LangOptions& LangOpts) const override
+    {
+        return LangOpts.CPlusPlus;
+    }
+    void registerMatchers(clang::ast_matchers::MatchFinder* Finder) override;
+    void check(const clang::ast_matchers::MatchFinder::MatchResult& Result) override;
+};
+
+} // namespace bitcoin
+
+#endif // NONTRIVIAL_THREADLOCAL_CHECK_H