FINERACT-3418: Move from grunt-devcode to grunt-preprocessor

[Napho]

Description

grunt-devcode currently does not install with later node versions. To be able to easily run npm installation without downgrades in node version, i have moved from grunt-devcode to grunt-preprocessor

Related issues and discussion

Issue-3495 Issue-3418

Screenshots, if any

Environment: Node: v17.2.0

Checklist

Please make sure these boxes are checked before submitting your pull request - thanks!

• [x] Validate the JS and HTML files with grunt validate to detect errors and potential problems in JavaScript code.

• [x] Run the tests by opening test/SpecRunner.html in the browser to make sure you didn't break anything.

• [x] If you have multiple commits please combine them into one commit by squashing them.

• [x] Read and understood the contribution guidelines at community-app/Contributing.md.