Convert @psalm-* annotations to generic or @phpstan-* annotation

[GromNaN]

Q	A
Type	improvement
BC Break	no
Fixed issues	Related to doctrine/.github#50

Summary

• Convert any @psalm-* to @phpstan-*
• non-empty-string, non-empty-array are supported by in PHPStorm.
• Remove = in custom type definition
• $ prefixed key in array-shape need quotes
• Detect deprecation usage with phpstan/phpstan-deprecation-rules

[alcaeus]

There are a few instances of phpstan-return and phpstan-param that we could replace with the non-prefixed variants. Essentially, anytime we use a type defined using phpstan-type we need to use a phpstan prefix, for all other types we can skip the prefix. I'll let you decide whether you want to do this in this pull request or in a separate one.

As for the aggregation builder types, I believe the issue is that we have duplicate type declarations for Stage and Pipeline, which is responsible for the circular reference issues we've encountered before. We might want to revisit those as well.

[alcaeus]

LGTM #yolo