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Inconsistent PascalCasing for DMMF type names for array fields

See original GitHub issue

Bug description

I found that Prisma generates wrong input names in DMMF for array fields:

          "name": "UserUpdatetestInput",
          "constraints": {
            "maxNumFields": 1,
            "minNumFields": 1
          },
          "fields": [

          "name": "UserCreateManytestInput",
          "constraints": {
            "maxNumFields": 1,
            "minNumFields": 1
          },
          "fields": [

It’s related to previous issue #5302.

How to reproduce

Generate Prisma Client for schema with array type field model.

Expected behavior

I would expect consistent type names to be always PascalCase.

Prisma information

model User {
  id          Int      @id @default(autoincrement())
  test        String[]
}

Environment & setup

OS: Windows 10 @ WSL 2 (Ubuntu 20.04)
Database: PostgreSQL
Node.js version: v15.3.0
Prisma version:

prisma               : 2.20.1
@prisma/client       : 2.20.1
Current platform     : debian-openssl-1.1.x
Query Engine         : query-engine 60ba6551f29b17d7d6ce479e5733c70d9c00860e (at node_modules/@prisma/engines/query-engine-debian-openssl-1.1.x)
Migration Engine     : migration-engine-cli 60ba6551f29b17d7d6ce479e5733c70d9c00860e (at node_modules/@prisma/engines/migration-engine-debian-openssl-1.1.x)
Introspection Engine : introspection-core 60ba6551f29b17d7d6ce479e5733c70d9c00860e (at node_modules/@prisma/engines/introspection-engine-debian-openssl-1.1.x)
Format Binary        : prisma-fmt 60ba6551f29b17d7d6ce479e5733c70d9c00860e (at node_modules/@prisma/engines/prisma-fmt-debian-openssl-1.1.x)
Default Engines Hash : 60ba6551f29b17d7d6ce479e5733c70d9c00860e
Studio               : 0.365.0
Preview Features     : orderByRelation, selectRelationCount, napi