Output console message for test case ended events in verbose mode, with status and issue counts

[stmontgomery]

This outputs a console message when each test case of a parameterized test function ends, including its pass/fail status and a count of the number of issues which were recorded, when running in verbose mode (swift test --verbose).

Here's an example:

◇ Test contrivedExample(x:) started.
◇ Test case passing 1 argument x → 1 (Swift.Int) to contrivedExample(x:) started.
◇ Test case passing 1 argument x → 2 (Swift.Int) to contrivedExample(x:) started.
✔ Test case passing 1 argument x → 1 (Swift.Int) to contrivedExample(x:) passed after 0.001 seconds.
✘ Test contrivedExample(x:) recorded an issue with 1 argument x → 2 at EventRecorderTests.swift:759:3: Expectation failed: (x → 2) == 1
↳ x: Swift.Int → 2
↳ 1: Swift.Int → 1
✘ Test case passing 1 argument x → 2 (Swift.Int) to contrivedExample(x:) failed after 0.001 seconds with 1 issue.
✘ Test contrivedExample(x:) with 2 test cases failed after 0.001 seconds with 1 issue.

Note: This leverages #1000 which added more robust identification of test cases.

Fixes #1021
Fixes rdar://146863942

Checklist:

• Code and documentation should follow the style of the Style Guide.
• If public symbols are renamed or modified, DocC references should be updated.

[grynspan]

"Passing [...] passed after [...]"

Might want to workshop the text here.

[stmontgomery]

Might want to workshop the text here.

Thanks, I was planning to review the wording again before landing. I've now refined this to the following:

Test case passing [arguments] to [function] started.
…
Test case passing [arguments] to [function] (passed | failed) after [duration].

[stmontgomery]

@swift-ci please test

[stmontgomery]

@swift-ci please test Linux