Rename binary attachment_service -> storage_controller (#7042)

## Problem

The storage controller binary still has its historic
`attachment_service` name -- it will be painful to change this later
because we can't atomically update this repo and the helm charts used to
deploy.

Companion helm chart change:
https://github.com/neondatabase/helm-charts/pull/70

## Summary of changes

- Change the name of the binary to `storage_controller`
- Skipping renaming things in the source right now: this is just to get
rid of the legacy name in external interfaces.

---------

Co-authored-by: Arpad Müller <arpad-m@users.noreply.github.com>

Dockerfile

@@ -53,7 +53,7 @@ RUN set -e \
       --bin pagectl  \
       --bin safekeeper  \
       --bin storage_broker  \
-      --bin attachment_service  \
+      --bin storage_controller  \
       --bin proxy  \
       --bin neon_local \
       --locked --release \
@@ -81,7 +81,7 @@ COPY --from=build --chown=neon:neon /home/nonroot/target/release/pageserver
 COPY --from=build --chown=neon:neon /home/nonroot/target/release/pagectl             /usr/local/bin
 COPY --from=build --chown=neon:neon /home/nonroot/target/release/safekeeper          /usr/local/bin
 COPY --from=build --chown=neon:neon /home/nonroot/target/release/storage_broker      /usr/local/bin
-COPY --from=build --chown=neon:neon /home/nonroot/target/release/attachment_service  /usr/local/bin
+COPY --from=build --chown=neon:neon /home/nonroot/target/release/storage_controller  /usr/local/bin
 COPY --from=build --chown=neon:neon /home/nonroot/target/release/proxy               /usr/local/bin
 COPY --from=build --chown=neon:neon /home/nonroot/target/release/neon_local          /usr/local/bin