Add supported architecture description

[zamazan4ik]

Supported hardware architectures

Product: Tarantool
Audience/target: Developers, DevOps
Root document: TBA
SME: @tsafin

Details

This looks like high-level information relevant on the step when the user is choosing whether to opt for Tarantool or not. So it may have to be on the front page (marketing content).
However, it can also be included in the documentation.
This might look like a part of an epic on restructuring documentation.

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• Write about officially supported hardware architectures by Tarantool. If there are several types of support (like official/only-CI/only several manual tests) - describe all of them. Just tell somehow to the end-users, on which target architectures they run Tarantool
• Related issue: Add support for AWS Graviton tarantool#5471

Definition of done

• Add documentation about the supported hardware architectures to the documentation

CC @tsafin