Moving typescript-operations 1->2 generates Maybe-wrapped custom types

**Describe the bug**

Upgrading `typescript-operations` from v1.x to v2.x causes custom types in codegen to be generated as Maybe<...> wrapped around them.

Downgrading with this diff "solves" the problem:

```
diff --git a/analytics-app/package.json b/analytics-app/package.json
index 9153ad69..e95b29b7 100644
--- a/analytics-app/package.json
+++ b/analytics-app/package.json
@@ -99,7 +99,7 @@
"@graphql-codegen/schema-ast": "^2.0.0",
"@graphql-codegen/typed-document-node": "^2.1.3",
"@graphql-codegen/typescript": "^1.23.0",
- "@graphql-codegen/typescript-operations": "^2.1.3",
+ "@graphql-codegen/typescript-operations": "^1.18.4",
"@graphql-typed-document-node/core": "^3.1.0",
"@next/bundle-analyzer": "^11.1.0",
"@storybook/addon-actions": "^6.3.6",
diff --git a/analytics-app/yarn.lock b/analytics-app/yarn.lock
index ffe9f787..c86516ea 100644
--- a/analytics-app/yarn.lock
+++ b/analytics-app/yarn.lock
@@ -1727,14 +1727,14 @@
change-case-all "1.0.14"
tslib "~2.3.0"

-"@graphql-codegen/typescript-operations@^2.1.3":
- version "2.1.3"
- resolved "https://registry.yarnpkg.com/@graphql-codegen/typescript-operations/-/typescript-operations-2.1.3.tgz#34f94e323c69006788e7eb0f4d039522a95dd31f"
- integrity sha512-CGRc2mu7NVW+U6J+a66YdLn7UAZFrVO1axBSzgQOCR9OaSJ9Kr2K3Iq/R8PX31YHWu6hDI93Nf8zc2TIiRLDwQ==
+"@graphql-codegen/typescript-operations@^1.18.4":
+ version "1.18.4"
+ resolved "https://registry.yarnpkg.com/@graphql-codegen/typescript-operations/-/typescript-operations-1.18.4.tgz#78149af3a949b760a7af7526593f2b7269a6841a"
+ integrity sha512-bxeRaCCwu2rUXkRj6WwMVazlMignemeUJfDjrK7d4z9o9tyjlrGWnbsjeZI7M17GNCARU9Vkr6XH94wEyooSsA==
dependencies:
- "@graphql-codegen/plugin-helpers" "^2.1.1"
- "@graphql-codegen/typescript" "^2.2.0"
- "@graphql-codegen/visitor-plugin-common" "2.2.0"
+ "@graphql-codegen/plugin-helpers" "^1.18.8"
+ "@graphql-codegen/typescript" "^1.23.0"
+ "@graphql-codegen/visitor-plugin-common" "1.22.0"
auto-bind "~4.0.0"
tslib "~2.3.0"

@@ -1748,16 +1748,6 @@
auto-bind "~4.0.0"
tslib "~2.3.0"

-"@graphql-codegen/typescript@^2.2.0":
- version "2.2.1"
- resolved "https://registry.yarnpkg.com/@graphql-codegen/typescript/-/typescript-2.2.1.tgz#5655feba721a6b9eb587d40a522dcd729b6a1e51"
- integrity sha512-U3sJwgw+x9pascy9BTdD+MiLLyvDfldQYahaJBBmaA3OuTihn+GMiOC5+zaoizf5PN5M6pjs2H4aejXbvUWw/A==
- dependencies:
- "@graphql-codegen/plugin-helpers" "^2.1.1"
- "@graphql-codegen/visitor-plugin-common" "2.2.0"
- auto-bind "~4.0.0"
- tslib "~2.3.0"
-
```

**To Reproduce**
Steps to reproduce the behavior:

Configure the world like detailed below, and upgrade `@graphql-codegen/typescript` with the inverse diff above.

1. My GraphQL schema:

```graphql
export type Maybe = T | null;
export type Exact = { [K in keyof T]: T[K] };
export type MakeOptional = Omit & { [SubKey in K]?: Maybe };
export type MakeMaybe = Omit & { [SubKey in K]: Maybe };
/** All built-in and custom scalars, mapped to their actual values */
export type Scalars = {
ID: string;
String: string;
Boolean: boolean;
Int: number;
Float: number;
_float4: number;
_float8: number;
_int2: number;
_int4: number;
_numeric: number;
_uuid: string;
bigint: string;
bpchar: string;
bytea: string;
date: string;
float8: number;
interval: string;
jsonb: Record | null;
numeric: number;
timestamp: string;
timestamptz: string;
uuid: string;
};
export type ModelRuns = {
readonly __typename?: 'modelRuns';
readonly appId: Scalars['uuid'];
readonly id: Scalars['bigint']
}
```

2. My GraphQL operations:

```graphql
query LatestModelRun($appId: uuid!) {
run: modelRuns {
id
}
}
```

3. My `codegen.yml` config file:

```yml
overwrite: true

schema:
- http://localhost:8080/v1/graphql:
headers:
x-hasura-admin-secret: x

documents:
- src/**/*.graphql
- '!src/schema/graphql.graphql'

generates:
# basic types from the db
# https://www.graphql-code-generator.com/docs/plugins/typescript
src/schema/types.ts:
plugins:
- typescript
config:
immutableTypes: true
enumsAsTypes: true
strictScalars: true
scalars:
_numeric: number
numeric: number
_int2: number
_int4: number
_float8: number
bigint: string
bpchar: string
date: string
float8: number
_float4: number
interval: string
jsonb: Record | null
timestamptz: string
timestamp: string
_uuid: string
uuid: string
bytea: string

# can be used to provide typed introspection when setting up Apollo Client
src/schema/graphql.schema.json:
plugins:
- introspection

# https://www.graphql-code-generator.com/docs/presets/near-operation-file
src/:
preset: near-operation-file
presetConfig:
baseTypesPath: schema/types.ts
plugins:
- typescript-operations

# https://www.graphql-code-generator.com/docs/plugins/named-operations-object
# { refetchQueries: [namedOperations.Query.GetConnectors] }
- named-operations-object

# https://the-guild.dev/blog/typed-document-node
- typed-document-node

# https://www.graphql-code-generator.com/docs/plugins/schema-ast
src/schema/graphql.graphql:
plugins:
- schema-ast
config:
includeDirectives: true
```

**Expected behavior**
v1 output is good enough/working:

```ts
export type LatestModelRunQuery = (
{ __typename?: 'query_root' }
& { run: Array<(
{ __typename?: 'modelRuns' }
& Pick
)> }
);
```

v2 output:

```ts
export type LatestModelRunQuery = { __typename?: 'query_root', run: Array<{ __typename?: 'modelRuns', id: any }> };
```

**Environment:**

- OS: macos
```json
{
"@graphql-codegen/cli": "^2.0.1",
"@graphql-codegen/introspection": "^1.18.2",
"@graphql-codegen/named-operations-object": "^1.18.2",
"@graphql-codegen/near-operation-file-preset": "^2.1.3",
"@graphql-codegen/schema-ast": "^2.0.0",
"@graphql-codegen/typed-document-node": "^2.1.3",
"@graphql-codegen/typescript": "^1.23.0",
"@graphql-codegen/typescript-operations": "^1.18.4"
}
```
- NodeJS: v14.15.0

**Additional context**
Sorry for not providing an actual repro.