[mlir][IR] Add `getPropertyAsAttr` and `setPropertyFromAttr` methods.#150060

fabianmcg wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

fabianmcg:users/fabian/pr-get-set-propertyfabianmcg/llvm-project:users/fabian/pr-get-set-propertyCopy head branch name to clipboard