[BUG][Rust Client] Duplicated crate::models in Params struct

Created by: alesharik

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• Have you provided a full/minimal spec to reproduce the issue?
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• What's the actual output vs expected output?
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Description

Generated rust client has duplicated crate::models string in enum field types. But rust doesn't like it and fails with 'crate' in paths can only be used in start position in compilation phase. Also tested with a as query parameter, same results

openapi-generator version

5.0.0 5.0.1-SNAPSHOT 6.0.0-SNAPSHOT

OpenAPI declaration file content or url

---
openapi: 3.0.1
info:
  title: v3
  version: 3.0.0
servers:
  - url: https://example.com
paths:
  /v3/{a}:
    get:
      parameters:
        - name: a
          in: path
          required: true
          schema:
            $ref: '#/components/schemas/ReleaseType'
      responses:
        "200":
          description: search results matching criteria
components:
  schemas:
    ReleaseType:
      default: ga
      enum:
        - ga
        - ea
      type: string

Generation Details

Generator: rust Config:

{
  "library": "reqwest",
  "packageName": "api",
  "packageVersion": "1.0.0",
  "supportAsync": "true",
  "useSingleRequestParameter": "true"
}

Expected output (src/apis/default_api.rs)

/// struct for passing parameters to the method `v3_a_get`
#[derive(Clone, Debug)]
pub struct V3AGetParams {
    pub a: crate::models::ReleaseType
}

Actual output (src/apis/default_api.rs)

/// struct for passing parameters to the method `v3_a_get`
#[derive(Clone, Debug)]
pub struct V3AGetParams {
    pub a: crate::models::crate::models::ReleaseType
}