Allow reshapes for 'F' ordered arrays (#455)

* First shot at implementing 'F' ordered array reshapes

* Remove restriction on reshape order

* Refactor to unify paths

* Slight adjustment

* Update comment wording

* Rough draft of old -> new axis mapping

* Absorb new tag propagation

* Revert changes

* don't linearize everything

* pass tests with new reshaped indices getter

* revert change that belongs to another branch

* fix mypy issues

* fix failing arraycontext test

* fix failing flake8 test

* fixes

* remove unnecessary import

* ruff fixes + small change

* Stopped in the middle

* improved index expression generation

* add test for F ordered reshapes

* remove redundant scalar check

* Improve reshape docs

* Goodbye unnecessary variable

* Way more reshape test coverage

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Co-authored-by: Andreas Kloeckner <inform@tiker.net>