Enabling Zaamo in the default config #1508
Description
Even though Zaamo is disabled in the config, atomics are supported because A is supported by default, and Zaamo is currently enabled whenever A is.
This leads to workarounds like checking for (Zaamo | A) when validating the config for Zicfiss, which is different from the text of the spec, where Zaamo is specified as a dependency for Zicfiss but not A.
We should revisit this dependency structure for container extensions like A, and update either the validation logic or the spec to fix such incongruities.