consolidate output and clean up legacy code and settings

[connectdotz]

Summary

• consolidate test run output from OutputChannel to Terminal.
• does not open TestExplorer "last run" terminal automatically on starting up anymore.
• retire jest.showTerminalOnLaunch (potential breaking change)
• update jest.testExplorer interface, removed enabled and showClassicStatus (potential breaking change)
• remove legacy status decorations (potential breaking change)
• fix random missing output issue
• detect more common errors and output action inline
• consolidate runtime event handling (regarding output) to test-provider.
• upgrade vscode engine to 1.68.1 (May 2022)

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fixes #882

[coveralls]

Pull Request Test Coverage Report for Build 3120671118

• 231 of 235 (98.3%) changed or added relevant lines in 13 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 95.774%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/StatusBar.ts	0	1	0.0%
src/test-provider/test-provider.ts	14	15	93.33%
src/test-provider/test-item-data.ts	70	72	97.22%

Totals
Change from base Build 3048149288:	0.2%
Covered Lines:	2753
Relevant Lines:	2814

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💛 - Coveralls