fix(boilerplate): reworks some mst removal decorators

[frankcalise]

Please verify the following:

• yarn test jest tests pass with new tests, if relevant
• yarn lint eslint checks pass with new code, if relevant
• yarn format:check prettier checks pass with new code, if relevant
• README.md (or relevant documentation) has been updated with your changes
• If this affects functionality there aren't tests for, I manually tested it, including by generating a new app locally if needed (see docs).

Describe your PR

• Closes Unable to initialize a new project using the ignite CLI  #2829
• Closes Generated code has syntax errors #2828
• The reasons this occurred is when some different linting rules were applied (due to conditionals getting longer, prettier update, etc) the previous @mst mark up to remove / adjust syntax lines no longer worked. These changes fix that.

How to Test

1. Observe failure via npx ignite-cli@10.0.3 new PizzaLint --overwrite --packager=npm --yes --debug --install-deps false --state none --remove-demo
2. Checkout this branch
3. Observe no failure via ignite/bin/ignite new PizzaLint --overwrite --packager=npm --yes --debug --install-deps false --state none --remove-demo where the first ignite directory is this GitHub project

[Jpoliachik]

Good fix.
Still not a huge fan of how nitpicky the removal decorators can be, but I honestly don't know a better way to be able to support some of the code changes necessary for MST removal.

[infinitered-circleci]

🎉 This PR is included in version 10.0.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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