Revert sketchlib-rust path dependency once it is open sourced

[milindsrivastava1997]

Context

`sketchlib-rust` (https://github.com/ProjectASAP/sketchlib-rust) is currently a private repo. As a temporary workaround, it is being vendored locally and rsynced to CloudLab nodes rather than fetched directly from GitHub by Cargo.

What was changed (and must be reverted)

1. `Utilities/components.conf` — added `sketchlib-rust` so it gets rsynced to nodes. Remove this line:
   ```
   sketchlib-rust
   ```

2. `.gitignore` — added `sketchlib-rust/` to prevent committing the private source. Remove this entry once the repo is public.

3. Local clone at `asap-internal/sketchlib-rust/` — the repo source is vendored here. Delete it once the public repo is used directly.

Note: `QueryEngineRust/Cargo.toml` already uses the git dependency (PR ProjectASAP/asap-internal#434 kept/restored this). No change needed there.

Steps to revert

Once `ProjectASAP/sketchlib-rust` is made public:

1. Remove `sketchlib-rust` from `Utilities/components.conf`
2. Remove `sketchlib-rust/` from `.gitignore`
3. Delete the local clone at `asap-internal/sketchlib-rust/`
4. Regenerate `Cargo.lock` to pick up the latest public commit:
   ```bash
   CARGO_NET_GIT_FETCH_WITH_CLI=true cargo generate-lockfile
   ```

[milindsrivastava1997]

Originally by @linear[bot] on 2026-02-27:

PRO-440

[milindsrivastava1997]

Originally by @milindsrivastava1997 on 2026-02-27:

Additional items to revert from PR ProjectASAP/asap-internal#434

PR ProjectASAP/asap-internal#434 added more temporary workarounds that also need to be reverted once sketchlib-rust is public:

5. QueryEngineRust/Dockerfile — remove the sketchlib-rust COPY line:

   - COPY sketchlib-rust ./sketchlib-rust

6. QueryEngineRust/Cargo.lock — after reverting Cargo.toml back to the git dependency, regenerate the lock file:

   cd QueryEngineRust && cargo generate-lockfile
   

[milindsrivastava1997]

Originally by @milindsrivastava1997 on 2026-02-27:

CC @zzylol

[milindsrivastava1997]

Originally by @milindsrivastava1997 on 2026-02-27:

Additional items to revert from PR ProjectASAP/asap-internal#434

PR ProjectASAP/asap-internal#434 added more temporary workarounds that also need to be reverted once sketchlib-rust is public:

5. QueryEngineRust/Dockerfile — remove the sketchlib-rust COPY line, and revert the Cargo.toml/Cargo.lock COPY back to the original (which included QueryEngineRust/Cargo.lock):

   - COPY sketchlib-rust ./sketchlib-rust
   - COPY Cargo.toml Cargo.lock ./
   - COPY QueryEngineRust/Cargo.toml ./QueryEngineRust/
   + COPY QueryEngineRust/Cargo.toml QueryEngineRust/Cargo.lock ./QueryEngineRust/

   Note: once sketchlib-rust is a git dependency again, QueryEngineRust/Cargo.lock will need to be regenerated and committed separately.

6. QueryEngineRust/Cargo.lock — after reverting Cargo.toml back to the git dependency, regenerate the lock file. Since QueryEngineRust is part of the root workspace, the lock file lives at the repo root (/Cargo.lock), not inside QueryEngineRust/. The Dockerfile will need a QueryEngineRust-specific lock file only if it is removed from the workspace, otherwise just copy the root Cargo.lock.