transformInputValue chokes on queries that rely on array input coercion

### Issue workflow progress

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- [ ] 1. The issue provides a reproduction available on Github, Stackblitz or CodeSandbox
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> Please make sure the GraphQL Tools package versions under `package.json` matches yours.
- [ ] 2. A failing test has been provided
- [ ] 3. A local solution has been provided
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---

**Describe the bug**

`transformInputValue` fails with:

```
TypeError: value.map is not a function at transformInputValue (.../node_modules/@graphql-tools/utils/cjs/transformInputValue.js)
```

when the client is depending on the array input field coercion.

**To Reproduce**

I'm using `graphql-tools` to build a stitched schema using `graphql-mesh`. I have an upstream graphql server that accepts a query with an input type, and the input type contains a field with an array type. E.g.

```graphql
query {
someField(input: SomeInput): String
}

input SomeInput {
fieldX: [String]
}
```

Some existing code in the application is sending `fieldX: "valueY"` instead of `fieldX: ["valueY"]`, but now that I'm sending that query to my new `graphql-mesh`-based server it hits `transformInputValue` because I'm using a `rename` transform to rename the field.

**Expected behavior**

`transformInputValue` should check to see if the incoming value is an array before mapping over it.

**Environment:**

- OS: MacOS
- `@graphql-tools/utils`: `8.8.0`
- NodeJS: 16

**Additional context**

Start by locating transformInputValue.js in the GraphQL Tools utilities and inspect the path that handles renamed input fields. Reproduce the single-value input for fieldX: [String], then verify that array coercion no longer causes a value.map error and that array inputs still transform correctly.

Written by the indexing model from the issue text.