Add related object filter criteria to various filter types in graphql schema

[WithoutPants]

Adds related object filters to filter on fields on related objects in the graphql schema.

Note: this PR does not include UI support for the new criteria.

Includes significant restructuring and refactoring of the filter handling code in the sqlite package.

The following filter criteria have been added:

Scenes

• galleries_filter,
• performers_filter
• studios_filter
• tags_filter
• movies_filter
• markers_filter

Images

• galleries_filter,
• performers_filter
• studios_filter
• tags_filter

Galleries

• scenes_filter,
• images_filter
• performers_filter
• studios_filter
• tags_filter

Scene Markers

• scene_filter

Movies

• scenes_filter
• studios_filter

Performers

• scenes_filter
• images_filter
• galleries_filter
• tag_filter

Studios

• scenes_filter
• images_filter
• galleries_filter

Tags

• scenes_filter
• images_filter
• galleries_filter

An example usage is to find images in galleries with a specific tag:

query {
  findImages(image_filter: {
    galleries_filter: {
      tags: {
        modifier:INCLUDES
        value:[3]
      }
    }
  }) {
    images {
      id
    }
  }
}

Related to #4844, #2349