Allow new CustomVariable segments to provide all custom variable suggested values by allowing the suggestedValuesCallback to accept Live.getLastVisitDetails data.

Allow Segments to define multiple SQL columns if the segment value can be matched in any of those fields, and use to define two new segments: customVariableName & customVariableValue.

Adding System test case that showcases the bug: ecommerce report with segment "Page URL" shows 0 data

Refactor API.getSegmentsMetadata and Plugin\Segment so segments are all defined through Plugin\Segment class in dimensions & make sure AutoSuggestAPITest data providers do not use database.

Update misc/log-analytics repo for https://github.com/piwik/piwik-log-analytics/issues/67 and update expected test output.

Add expanded query param to DocumentationGenerator so the API test generation logic will not erase the param from API tests.

Refs #8311, add automated system test for the api_internal_call.php example script. Includes new proxy script that will call another script using Piwik's test environment, but w/o actually setting up the test env.

Fix AnnotationsTest.php, no longer needed to use FakeAccess explicitly, DI test overrides will set it.