* Setting up tests on import extension
* -Added API wrappers for all the azdata and vscode APIs to make them easily mockable
-Added some unit tests for the import extension
-Some code logic separations
* -added code report for the import extension in ci
* Did some more code refractoring
* -Added json report generation
* updated vscodetestcoverage to latest version in import extension.
* -remove duplicate codecoverageConfig.json
* Changed the activation event from onCommand to startup "*"
* Refractored some code to fix the issue
* Made some PR related changes and fixed a condition where the same error was occurring when the flatFileImport has to download binaries from the internet.
* Reverted activation event back to previous state as it had no effect.
* Made changes mentioned in the PR
Co-authored-by: Aasim Shahnawaz Khan <aaskhan@microsoft.com>
