Torii external-url arg to support https

[broody]

Torii's external-url arg to support https scheme, this will help fix the broken subscription queries in the gql playground for Slot hosted Toriis

Current subscription error slot torii:

{
  "error": "Could not connect to websocket endpoint wss://api.cartridge.gg/graphql/ws. Please check if the endpoint url is correct."
}

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 70.29%. Comparing base (6b6219f) to head (b9de655).

Files	Patch %	Lines
crates/torii/graphql/src/server.rs	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1898      +/-   ##
==========================================
- Coverage   70.30%   70.29%   -0.02%     
==========================================
  Files         315      315              
  Lines       35843    35850       +7     
==========================================
+ Hits        25201    25202       +1     
- Misses      10642    10648       +6     

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