C++: Remove some `IndirectOperand` and `IndirectInstruction` nodes#11218

rdmarsh2 merged 8 commits intogithub:mathiasvp/replace-ast-with-ir-use-usedataflowgithub/codeql:mathiasvp/replace-ast-with-ir-use-usedataflowfrom

MathiasVP:merge-some-indirect-and-instruction-nodesMathiasVP/ql:merge-some-indirect-and-instruction-nodesCopy head branch name to clipboard