[tasks] update 'test-resources' task examples to use new task features/support

[vince-fugnitto]

Description

For test and documentation purposes, the test-resources folder tasks should be updated to include additional or updated examples which make use of new functionality present in the task system including problemMatchers and inputs variables.

This will allow for quicker and easier testing of future pull requests which affect the task extension (no longer need to re-create new tests), and also help during regression testing.

Additional Information

• file: tasks.json
• problemMatchers: prompt user to choose parser to parse task output #5877
• input variables: support input variables for tasks #6331