oneOf - indexOfFittingSchema doesn't match the correct index.

[cihad]

Describe the bug

const schema = {
  type: "object",
  properties: {
    provider: {
      oneOf: [
        {
          type: "object",
          title: "Google",
          properties: {
            type: { const: "Google" }
          }
        },
        {
          type: "object",
          title: "Github",
          properties: {
            type: { const: "Github" },
            accessKey: { type: "string" }
          }
        }, 
      ]
    }
  }
}

const data = {
  provider: {
    type: "Github"
  }
}

In this case, the oneOf renderer tab should come with the Github tab selected, but it comes with the Google tab selected.

Expected behavior

const values are considered for the selected tab

Steps to reproduce the issue

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Screenshots

No response

Which Version of JSON Forms are you using?

v3.4.1

Package

Core

Additional context

The problem is caused by the indexOfFittingSchema prop giving the wrong value. This is also caused by excluding const errors with structuralKeywords in the dataIsValid function.