Fix vitest config

[gndelia]

The Vitest configuration has 2 errors:

• By using the legacy configuration of Eslint, the rules need to be prepended with @vitest/ instead of vitest. This wasn't in the docs, and if not using the appropriate prefix, it gives an error of missing definition of rule. (I created an issue in their repo to improve the docs about this [docs] Legacy rules are prepended with "@", but it is not in the docs vitest-dev/eslint-plugin-vitest#566)

• The config was disabling some rules that did not belong to the vitest plugin, but were from bloq/node. Commonly, with mocha, we would use bloq/node before bloq/mocha, which causes those rules to be available. We tried to replicate that here, but as I am using esm, we can't use some of the rules from bloq/node. By not including it, these rules are not defined, throwing an error as well. The correct behavior should be that every package should only disable rules from the config it extends. That's why I am removing from the vitest config the following disabling of rules:

'no-unused-expressions'
'node/no-unpublished-require'
'prefer-arrow/prefer-arrow-functions'

As the vitest config did not work, I consider this a bug fix instead of a breaking change.