requirements: Cleanup and normalize

Use lowercase only for requirement names and sort them in lexicographical order.

Move types-* in requirements-test.txt files as they are not required for execution and produce errors in docker:

swh-loader_1                    | Waiting for RabbitMQ to start
swh-loader_1                    | wait-for-it: waiting for amqp:5672 without a timeout
swh-loader_1                    | wait-for-it: amqp:5672 is available after 0 seconds
swh-loader_1                    | Register task types in scheduler database
swh-loader_1                    | wait-for-it: waiting for swh-scheduler:5008 without a timeout
swh-loader_1                    | wait-for-it: swh-scheduler:5008 is available after 0 seconds
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand vault: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand storage: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand search: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand scheduler: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand scheduler-journal: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand objstorage: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand loader: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand lister: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand indexer: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand deposit: The 'types-Flask' distribution was not found and is required by swh.core
swh-loader_1                    | WARNING:swh.core.cli:Could not load subcommand counters: The 'types-Flask' distribution was not found and is required by swh.core

Remove no longer used requirements-test-db.txt file and associated testing-db extra in setup.py.

(swh) ✔ ~/swh/swh-environment [make-package-fixes L|✚ 1⚑ 13] 
14:19 $ mr grep testing-db
mr grep: /home/anlambert/swh/swh-environment/snippets

mr grep: /home/anlambert/swh/swh-environment/swh-auth

mr grep: /home/anlambert/swh/swh-environment/swh-core

mr grep: /home/anlambert/swh/swh-environment/swh-counters

mr grep: /home/anlambert/swh/swh-environment/swh-dataset

mr grep: /home/anlambert/swh/swh-environment/swh-deposit

mr grep: /home/anlambert/swh/swh-environment/swh-docs

mr grep: /home/anlambert/swh/swh-environment/swh-fuse

mr grep: /home/anlambert/swh/swh-environment/swh-graph

mr grep: /home/anlambert/swh/swh-environment/swh-icinga-plugins

mr grep: /home/anlambert/swh/swh-environment/swh-indexer

mr grep: /home/anlambert/swh/swh-environment/swh-journal

mr grep: /home/anlambert/swh/swh-environment/swh-lister

mr grep: /home/anlambert/swh/swh-environment/swh-loader-core

mr grep: /home/anlambert/swh/swh-environment/swh-loader-git

mr grep: /home/anlambert/swh/swh-environment/swh-loader-mercurial

mr grep: /home/anlambert/swh/swh-environment/swh-loader-svn

mr grep: /home/anlambert/swh/swh-environment/swh-model

mr grep: /home/anlambert/swh/swh-environment/swh-objstorage

mr grep: /home/anlambert/swh/swh-environment/swh-objstorage-replayer

mr grep: /home/anlambert/swh/swh-environment/swh-py-template

mr grep: /home/anlambert/swh/swh-environment/swh-scanner

mr grep: /home/anlambert/swh/swh-environment/swh-scheduler

mr grep: /home/anlambert/swh/swh-environment/swh-search

mr grep: /home/anlambert/swh/swh-environment/swh-storage

mr grep: /home/anlambert/swh/swh-environment/swh-vault

mr grep: /home/anlambert/swh/swh-environment/swh-web

mr grep: /home/anlambert/swh/swh-environment/swh-web-client

mr grep: finished (28 ok)

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Migrated from D5837 (view on Phabricator)