pageserver: https for management API (#11025)

## Problem

Storage controller uses unencrypted HTTP requests for pageserver
management API.

Closes: https://github.com/neondatabase/cloud/issues/24283


## Summary of changes
- Implement `http_utils::server::Server` with TLS support.
- Replace `hyper0::server::Server` with `http_utils::server::Server` in
pageserver.
- Add HTTPS handler for pageserver management API.
- Generate local SSL certificates in neon local.

libs/http-utils/Cargo.toml

@@ -8,6 +8,7 @@ license.workspace = true
 anyhow.workspace = true
 bytes.workspace = true
 fail.workspace = true
+futures.workspace = true
 hyper0.workspace = true
 itertools.workspace = true
 jemalloc_pprof.workspace = true
@@ -21,6 +22,7 @@ serde_path_to_error.workspace = true
 thiserror.workspace = true
 tracing.workspace = true
 tokio.workspace = true
+tokio-rustls.workspace = true
 tokio-util.workspace = true
 url.workspace = true
 uuid.workspace = true