[clang-tools-extra] [clangd] Add tweak to override pure virtuals (PR #139348)

[kadir çetinkaya via cfe-commits]

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@@ -70,6 +70,16 @@ Code completion
 Code actions
 ^^^^^^^^^^^^
 
+- New ``clangd`` code action: "Override pure virtual methods". When invoked on a
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kadircet wrote:

nit: i'd drop `clangd`, it's already under clangd section.

https://github.com/llvm/llvm-project/pull/139348