Mac installation on M chips

[jkalayan]

To install aiida on a mac with an M1 chip, the standard installation does not work, instead, the following steps should be performed:

1. conda install -c conda-forge mamba
2. mamba create --name aiida-2.4.0 -c conda-forge aiida-core=2.4.0
3. conda install anaconda::postgresql
4. brew install rabbitmq
   or conda install conda-forge::rabbitmq-server (need to double check this)