Disable Yarn integrity checks in Development

[josemigallas]

What this PR does / why we need it:

Yarn's integrity checks detect unsatisfied or missing NPM dependencies. The problem is some of the error might be inevitable since are thrown by dependencies of a dependency and it's really annoying to get this error "out of nowhere" and block certain commands like bundle or the assets:compile.

error Couldn't find an integrity file                                                                                                                                                           
error Found 1 errors.
                                                                                                                                                                           
========================================
  Your Yarn packages are out of date!
  Please run `yarn install --check-files` to update.
========================================

To disable this check, please change `check_yarn_integrity`
to `false` in your webpacker config file (config/webpacker.yml).

yarn check v1.22.4
info Visit https://yarnpkg.com/en/docs/cli/check for documentation about this command.

Verification steps

Hard to say but I'm sure everyone has seen this, specially @3scale/system-ux .

Webpacker has officially removed yarn integrity since v5, and they recommend to disable it if causing problems.
See PR
And issues rails/webpacker#2354, rails/webpacker#2517
We are still using v4, but I think we can remove it.
WDYT @didierofrivia @hallelujah ?

[hallelujah]

I always overcome it by removing node_modules and do yarn install:safe

@didierofrivia what do you think about this?

[josemigallas]

I always overcome it by removing node_modules and do yarn install:safe

@didierofrivia what do you think about this?

I usually am able to work around it as well but it's become super annoying lately and the only solution that works for me is disabling it.