Connect blob page to Vue Router and use it to generate axios request url

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When uploading a blob modal, the request path is generated from Vue router.

https://gitlab.com/gitlab-org/gitlab/blob/9860379415fbf3d168eede7e8bcceabae4934ede/app/assets/javascripts/repository/components/upload_blob_modal.vue#L194

const {
  $route: {
    params: { path },
  },
} = this;

const uploadPath = joinPaths(this.path, path);
return this.submitRequest('post', uploadPath);

In this MR > !62880 (merged), we added support for "replacing a blob". The request path is based on the prop replacePath that is coming from HAML's data attribute. Let's instead make it consistent with the behaviour of "uploading" and switch it to use Vue router.

  1. Connect Vue router to blob show page > app/assets/javascripts/pages/projects/blob/show/index.js
  2. Remove `replacePath
  3. Create the axio request url from the path information of Vue router.
Edited by 🤖 GitLab Bot 🤖