Make userId segment work for all operators (Is, is not, contains, does not contain, is null, is not null)
fixes #8062
this reverts https://github.com/piwik/piwik/commit/252798d2d742cae998a1f42f50a5ba37c98069df

Use custom DefinitionSource to access TestingEnvironmentVariables so those variables can be easily overridden by test classes through provideContainerConfig(BeforeClass).

Fixing test in CliMultiTest.php that fails now that loaded access is removed when the environment is recreated. So now in RequestCommand when the container is recreated, the Access instance is destroyed and the doAsSuperUser call is negated.

Fixing ImportLogsTest that simulates a tracker failure. Instead of using authentication hack (which no longer works since test environment setup is unified), add an observer to Tracker.newHandler which throws an exception and returns the HTTP status code 500.

In ArchiveCronTest make sure to use real translations, because for some reason cron archiver will fail when archiving segments if translations aren't available. Segment archiving requests return the token General_DateRangeFromTo w/o anything else (only some of them).

Fixing ArchiveWebTest, now that test.php is used (which disables the logger), we must enable it in a test class override method, since this test checks the log output.

Fixing LogTest now that NullLogger is used for test environment setup.

Make sure translations are loaded in EnvironmentValidationTest.php.

Make sure the logger is enabled for ArchiveCronTest.

Rename Piwik_TestingEnvironment to TestingEnvironment and move the class to Piwik\Tests\Framework namespace. Remove manual require statements.

Also adds a missing URL Encoding for action URLs.
(when outlink or download urls contained `&` and such characters breaking the URL this possibly corrupted the tracking request).

Fixes #6244

Fixing BlobReportLimitingTest. Fixture::createConfig has no effect now, and setting config must be done after environment is created.

Add content tracking action to PrivacyManagerTest to make sure we test whether content impressions are correctly purged/preserved.

Since LogDataPurger::$deleteLogsOlderThan and LogDataPurger::$maxRowsToDeletePerQuery can be set using values from the DB, make them function parameters instead of service state. Change made in anticipation of move to DI.

Fix TrackerTest provideContainerConfig() method. Now that it is called during test case setup, check the const is defined before defining it. Otherwise, there will be an error regarding redefining the constant.

As the plugin does now nothing anymore, I removed it.

Add cron archiving API method only visible to superusers, use this in archive.php script and re-add php-cgi support to Console, which did not get merged in the past for some reason.

Refactor CronArchive, remove need to specify URL (also did same to CliMulti), remove test skipping in ArchiveWebTest & ArchiveCronTest.

Remove GlobalSettingsProvider interface and replace w/ GlobalSettingsProvider class, the class is the old IniSettingsProvider class.