"404 Not Found" error is received when navigate to "shots" or "export" pages on stage server

[SoftVision-CosminMuntean]

[Affected Platforms]:

• All Windows
• All Mac
• All Linux

[Affected Versions]:

• Nightly 72.0a1 try build

[Prerequisites]:

• Have a Nightly try build that uses the stage static server.
• Have the Network Monitor console opened (Ctrl+Shift+E).

[Steps to reproduce]:

1. Open the Nightly try build and navigate to "https://screenshots.stage.mozaws.net/shots" page.
2. Refresh the page.
3. Observe the Network Monitor console.

[Expected result]:

• No 404 status code is displayed

[Actual result]:

• A 404 status code is displayed for the "shots" file of the "screenshots.stage.mozaws.net" domain.

[Notes]:

• The issue is also reproducible when navigating to the "https://screenshots.stage.mozaws.net/export" page.
• Attached a screen recording with the issue:

[ianb]

This is expected, we're going to just turn off all of it at this point (since there's been deprecation warnings for a long time).