feat!: [junit] capture test case level out, error and attachments

[codito]

In v5.x and later, system-out and system-err logs are reported at a per testcase element in the report. Because each test adapter determines to also emit the console output and errors at test suite level, there may be some duplication for the messages.

v4.x and earlier behavior

Prior to v5.x, console stdout and stderr was reported only in the system-out and system-err elements at testsuite level. This would concatenate messages from all test results and information messages from adapter.

To disable output in reports: see https://github.com/spekt/testlogger/blob/master/src/JUnit.Xml.Package/README.md#storeconsoleoutput.

Fixes spekt/junit.testlogger#71, spekt/junit.testlogger#41, spekt/junit.testlogger#40, #130