Show all parsing errors during vet, not just the first

[mlieberman85]

I am not sure if this is a bug or currently intended behavior, but I would like to be able to show all currently evaluated schema violations during vet, not just the first one. I know there are the -i and -E` flags but they don't appear to do what I want.

An example:
testschema.cue

#TestSchema: {
    foo: "bar"
    baz: int
}

test.json

{
    "foo": "blah",
    "baz": "5"
}

cue vet -i -E testschema.cue testschema.json -d '#TestSchema'

foo: conflicting values "bar" and "blah":
    ./testschema.cue:2:10
    ./testschema.json:2:12

whereas I would hope to get something like:

foo: conflicting values "bar" and "blah":
    ./testschema.cue:2:10
    ./testschema.json:2:12

baz: conflicting values "5" and int (mismatched types string and int):
    ./testschema.cue:3:10
    ./testschema.json:3:12

My main use case is for linting here, as I don't have to run vet after every single error I fix. I would just need to fix errors and if those fixes expose something further down the line that's alright.

[verdverm]

Related: #1093

Relevant: #1319