[FEAT] Add QUIC/HTTP3 to SWAG

[brokoler]

Is this a new feature request?

• I have searched the existing issues

Wanted change

Add ngx_http_v3_module to support http3

Reason for change

HTTP3 adds many performance improvements compared to HTTP2.
SWAG is based on Alpine 3.21 and NGINX 1.26.2 which both support HTTP3 NGINX module.
The request was declined before based on older versions that didn't support the HTTP3 module, now it should be possible:
#452 (comment)

Proposed code change

No response

[martabal]

There’s an upstream PR to build nginx with the http3 module https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/76753. But it would be built with openssl which means no 0-rtt.