Add support for view=test query parameter

[jcscottiii]

Backend changes:

• Add "test" to the allowlist values for the view url parameter
• Add TestParseViewParam to assert behavior for existing view params and the new "test" parameter

Frontend changes:

• Add new Test View button
• Add test_view_ prefix. This prefix is used to keep track of the new view=test mode.
• Add new helper method isTestView() to support this new view
• Add helper method isInteropView to retroactively support the already supported interop view.
• Create getNodeTotalProp and getNodePassProp to encapsulate the logic of which property from the aggregation node to use.

About view=test mode

• Test pass is only counted if the number of subtest passes == the total subtests
• This should not display percentages. Only the counts from the first bullet point when at directory level.
• When on the individual test level, it should only show PASS when subtest passes == the total subtests
  • Other cases:
  • When the status == OKAY and subtest passes != the total subtests, still show FAIL
  • Show the status for other cases that come from the existing STATUS_ABBREVIATIONS mapping
  • Fallback to showing FAIL for anything else

For reviewers:

• Double check to make sure I accounted for the legacy v1 summary case.

High level view:

Test View:

Mixed View: