Replace `compare(a, b) == 0` with `equals(a, b)` in aaA.
Call `_xopCmp` which throws `Error` on usage `TypeInfo.compare`.
Revert "Hack fix Issue 10380 - [AA] Wrong code using associative array as key type in associative array"

This reverts commit 33ea0c56407b4a37c382e3fbfb11206c66900dae.
Merge pull request #522 from denis-sh/replace-`compare`-with-`equals`-in-aaA

Replace `compare(a, b) == 0` with `equals(a, b)` in aaA.