Lot of deprecation warnings coming from generated web app code due to CRA

[Martinsos]

When running wasp start, we get a lot of deprecation warning in console from the web app.

At the moment of writing, those are:

• rollup-plugin-backend
• fsevents
• request-promise-native
• request
• core-js
• har-validator
• sass-loader
• tsutils

I tracked them down using npm ls <package-name> and it turns out all of these are coming from CRA -> create-react-app -> package react-scripts.
I updated reeact-scripts to newest version however that did not help.

Then I found following issue:
facebook/create-react-app#9431 .

It turns out, these deprecation messages are coming from packages that react-scripts uses, so we are all waiting for those packages to take care of these deprecations.

Therefore, it doesn't seem like we can do much from here, except for possibly directly contributing to those packages or contributing to react-scripts to replace them with other packages.

[infomiho]

Not applicable since we switched to Vite via #1019