omit_resolver_fields option does not respect `models.<model>.fields.<field>.resolver` option

### What happened?

The `omit_resolver_fields` option that introduced by https://github.com/99designs/gqlgen/pull/2957 does not respect `models..fields..resolver` option, only schema directives are respected.

#### gqlgen.yml

```testdata/gqlgen_omit_resolver_fields_with_explicit_resolver.yml
# testdata/gqlgen_omit_resolver_fields_with_explicit_resolver.yml
schema:
- "schema_omit_resolver_fields_with_explicit_resolver.graphql"

exec:
filename: out_omit_resolver_fields/ignored.go
model:
filename: out_omit_resolver_fields/generated.go

omit_resolver_fields: true
models:
Base:
fields:
ResolverField:
resolver: true
```

#### schema.graphql

```testdata/schema_omit_resolver_fields_with_explicit_resolver.graphql
# testdata/schema_omit_resolver_fields_with_explicit_resolver.graphql
type Base {
StandardField: String!
ResolverField: String!
}
```

### What did you expect?

The `models..fields..resolver` option marks the field to be resolved with explit resolvers, so the `omit_resolver_fields` should respect also this option.

### Minimal graphql.schema and models to reproduce

```schema_omit_resolver_fields_with_explicit_resolver.graphql
type Base {
StandardField: String!
ResolverField: String!
}
```

### versions
- `go run github.com/99designs/gqlgen version`?
- `v0.17.45-dev`
- `go version`?
- `go version go1.22.0 linux/amd64`