[relay-operation-optimizer] Fragment types are eliminated

**Describe the bug**

Fragment types are eliminated when using the `relay-operation-optimizer` plugin.

**To Reproduce**

1. My GraphQL schema:

``

2. My GraphQL operations:

``

3. My `codegen.yml` config file:

``

**Expected behavior**

The fragments should be still there in their "optimized" form. E.g. you want to read a fragment from the apollo cache during runtime.

**Environment:**

- `@graphql-codegen/relay-optimizer-plugin@next`
- NodeJS: *

**Additional context (memo for me)**

I introduced this change here: https://github.com/n1ru4l/graphql-codegen-relay-plugins/commit/6578cbc1053bfe85f617130beb2853cb3ccf6461

However, I did not properly test it. I thought that skipping the `InlineFragmentsTransform` would be enough.

The correct solution seems to be the isolate of each fragment and it's inlined fragments into a single `GraphQLCompilerContext` and then apply the transforms. That way we receive all fragments with their inlined types.