[BUG]: downloading browsers via https endpoint does not work behind proxy in some cases.

Context:

System:

• OS: Linux 3.10 CentOS Linux 7 (Core)
• Memory: 15.78 GB / 125.51 GB
• Container: Yes

Binaries:

• Node: 16.8.0 - /usr/bin/node
• Yarn: 1.22.11 - /usr/bin/yarn
• npm: 7.24.0 - /usr/bin/npm

Languages:

• Bash: 4.2.46 - /usr/bin/bash

Describe the bug

Inside my company network we usually define proxy like this:

export http_proxy=http://proxy.company.com:3128/; export https_proxy=$http_proxy; export no_proxy=.company.com 

And as defined here: https://github.com/microsoft/playwright/blob/master/src/utils/utils.ts#L81 if protocol is not https then http.request will be used.

But end result is an https response.

This results in this error during installation (error sanitized to remove unecessary paths):

erroe <some>/node_modules/playwright: Command failed.
Exit code: 1
Command: node install.js
Arguments: 
Directory: <some>/node_modules/playwright
Output:
<some>/node_modules/playwright/lib/utils/registry.js:557
      throw new Error(`Failed to download ${title}, caused by\n${e.stack}`);
            ^
Error: Failed to download chromium v920619, caused by
TypeError [ERR_INVALID_PROTOCOL]: Protocol "https:" not supported. Expected "http:"
    at new NodeError (node:internal/errors:371:5)
    at new ClientRequest (node:_http_client:158:11)
    at Object.request (node:https:353:10)