Only generate AcqRel SafeHeap load methods when --relaxed-atomics is enabled#8193
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kripken
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Part of #8165. Add flag for --enable-relaxed atomics and enable it for the existing SafeHeap tests that previously implicitly depended on it. The next PR #8193 disables generation of AcqRel SafeHeap functions when the feature is disabled and adds new tests to cover that case. Also validate that the feature is enabled when a module includes an AcqRel load operation (currently the only one we support).
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The new tests don't contain the string
ARoracqrelfor the atomic load methods that are generated. Note that the safe load function names are still changed compared to before #8169 but I assume that no-one else relies on the names that we pick. Part of #8165.