Fix multi-variable substitution

[adrianisk]

Summary

Fixes variable substitution in launch.json debug configurations when an arg contains more than one variable

More details in #1039

Previous

/Users/foo/bar/node_modules/.bin/sst bind 'jest --testNamePattern="${jest.testNamePattern}" --config jest.config.ts --runInBand --watchAll=false "/Users/foo/bar/path/test/createOrUpdateLineageIntegration.integration.test.ts"'

Now

/Users/foo/bar/node_modules/.bin/sst bind 'jest --testNamePattern="creating an integration returns 200" --config jest.config.ts --runInBand --watchAll=false "/Users/foo/bar/path/test/createOrUpdateLineageIntegration.integration.test.ts"'

Test

I added a unit test, verified it was failing without this change, and that it passes with this change.

I also followed the eat your own dog food steps in the CONTRIBUTING readme, and verified things work in our repository with this change + changing the settings.json "jest.jestCommandLine" value to

"jest.jestCommandLine": "wrap () { NODE_OPTIONS=--experimental-vm-modules yarn sst bind \"jest --config=jest.config.ts $*\";}; wrap ",

to make sure the additional flags the plugin appends are substituted within "jest ..."

[coveralls]

Pull Request Test Coverage Report for Build 5394139157

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.003%) to 97.768%

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Totals
Change from base Build 5370976313:	-0.003%
Covered Lines:	3539
Relevant Lines:	3559

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💛 - Coveralls

[connectdotz]

Nice refactoring, great PR, thanks.