Authorization Header not read when importing a Postman file

[Alex23rodriguez]

Expected Behavior

When importing a Collection, headers named "Authorization" are ignored, instead of being added as a header or being added as an "API Key Auth" with KEY: Authorization, VALUE: {{value}} and ADD TO: Header

Actual Behavior

The header is completely ignored. This is a problem when importing a large collection, as there is no way to edit the Authorization or Header of many requests simultaneously without the use of a plugin. See example below

Reproduction Steps

1. Copy the following JSON schema (taken from a bigger collection found here):

   
   {
   "info": {
   "name": "Mirakl seller API: mmp",
   "schema": "https://schema.getpostman.com/json/collection/v2.0.0/collection.json"
   },
   "variables": [],
   "item": [
   {
     "name": "example",
     "request": {
       "method": "get",
       "url": {
         "raw": "{{URL}}/api/document-request/:document_request_id/lines",
         "host": ["{{URL}}"],
         "path": [
           "",
           "api",
           "document-request",
           ":document_request_id",
           "lines"
         ],
         "variable": [{ "key": ":document_request_id", "value": "value" }],
         "query": [{ "key": "shop_id", "value": "", "disabled": true }]
       },
       "header": [
         { "key": "Authorization", "value": "{{APIKEY}}" },
         { "key": "Accept", "value": "application/json" }
       ],
       "body": {}
     },
     "response": []
   }
   ]
   }

2. go to Home on the Insomnia App
3. click on "Create" > "Import from Clipboard"
4. Select "Import as Request Collection"
5. Notice how the request has no Header corresponding to the "Authorization" key, as well as no Auth Key

### Is there an existing issue for this?

- [X] I have searched the [issue tracker](https://www.github.com/Kong/insomnia/issues) for this problem.

### Additional Information

_No response_

### Insomnia Version

2023.1.0

### What operating system are you using?

macOS

### Operating System Version

12.6.2

### Installation method

Website

### Last Known Working Insomnia version

_No response_

[Makoehle]

Is there a way to provide a default auth for all requests in my collection?