viewDerivatives not understanding gql query variables

Hi all,

First of all thanks for this really powerful module!!

I believe there is a bug on how the `viewDerivative` process the `ViewsFilterInput`.

**Sample gql:**

```
query ($entityId: String!, $entityLanguage: LanguageId!, $langcode: String!) {
one: nodeById(id: $entityId, language: $entityLanguage) {
id: entityId
title: entityLabel
... on NodePage {
fieldContent {
component: entity {
... on ParagraphCatalog {
fieldView {
view: viewDerivative(filter: {langcode: "en"}) {
... on PostsGraphql1ViewResult {
results {
... on NodePost {
entityId
entityLabel
langcode {
value
}
}
}
}
}
}
}
}
}
}
}
two: nodeById(id: $entityId, language: $entityLanguage) {
id: entityId
title: entityLabel
... on NodePage {
fieldContent {
component: entity {
... on ParagraphCatalog {
fieldView {
view: viewDerivative(filter: {langcode: $langcode}) {
... on PostsGraphql1ViewResult {
results {
... on NodePost {
entityId
entityLabel
langcode {
value
}
}
}
}
}
}
}
}
}
}
}
three: postsGraphql1View(filter: {langcode: $langcode}) {
results {
langcode {
value
}
}
}
}
```

and here is the view:

- query `one` works just fine when using `view: viewDerivative(filter: {langcode: "en"}) {` (notice the hardcoded string for the language code).
- query `two` does not work when using `view: viewDerivative(filter: {langcode: $langcode}) {` (notice that here I'm using the variable.
- query `three` also works fine when using `three: postsGraphql1View(filter: {langcode: $langcode}) {` (here I'm using a variable but using the Query directly.

I already tried using `contextualFilter` instead of `filter` and the same behaviour happens.

Is there any workaround for this kind of scenario?

Thanks in advance!