storcon: use https for pageservers (#10759)

## Problem

Storage controller uses unsecure http for pageserver API.

Closes: https://github.com/neondatabase/cloud/issues/23734
Closes: https://github.com/neondatabase/cloud/issues/24091

## Summary of changes

- Add an optional `listen_https_port` field to storage controller's Node
state and its API (RegisterNode/ListNodes/etc).
- Allow updating `listen_https_port` on node registration to gradually
add https port for all nodes.
- Add `use_https_pageserver_api` CLI option to storage controller to
enable https.
- Pageserver doesn't support https for now and always reports
`https_port=None`. This will be addressed in follow-up PR.

pageserver/src/controller_upcall_client.rs

@@ -173,6 +173,7 @@ impl ControlPlaneGenerationsApi for ControllerUpcallClient {
                         listen_pg_port: m.postgres_port,
                         listen_http_addr: m.http_host,
                         listen_http_port: m.http_port,
+                        listen_https_port: None, // TODO: Support https.
                         availability_zone_id: az_id.expect("Checked above"),
                     })
                 }