fix(rmw-zenoh-rs): stop double-declaring parameter services

[YuanYuYuan]

Summary

Every rmw-zenoh-rs node declares its own six ROS 2 parameter services on top of the ones rclcpp already provides for it. Two Queryables answer the same service names with two independent implementations. This is a correctness concern, not only extra load: a real ros2 param get/set call can be answered by either one.

Root cause

rclcpp::Node's constructor already sets up its own generic parameter-service machinery (describe_parameters, get_parameters, get_parameter_types, list_parameters, set_parameters, set_parameters_atomically, plus /parameter_events) over rmw_create_service, unless the application opts out with NodeOptions::start_parameter_services(false).

NodeImpl::new() in rmw-zenoh-rs never told hiroz's ZContextBuilder to skip its own internal ParameterService, which is enabled by default. So every node ended up with both sets declared under identical names.

Fix

Add .without_parameters() to the builder chain in NodeImpl::new(). rclcpp's own parameter services are unaffected — they never depended on hiroz's internal one, which only matters when hiroz is driven through its native API rather than as an RMW backend under rclcpp.

What fails without this

	before this PR	with this PR
NodeImpl::new builds a node	declares 6 parameter-service Queryables of its own, on top of whatever rclcpp adds	declares none
no_parameter_services.rs (added here)	FAILED: lists all 6 duplicated service names	ok

The new test builds a NodeImpl directly against an in-process router (no rclcpp process needed — NodeImpl::new is plain Rust) and reads the discovery graph after a settle window. Reverting only the .without_parameters() line reproduces the failure with the exact service names; restoring it passes.

Breaking Changes

None. rmw-zenoh-rs nodes stop declaring redundant services; rclcpp's own parameter services are unaffected.

Checklist

• Added a test: crates/rmw-zenoh-rs/tests/no_parameter_services.rs. Verified both directions (fails without the fix, passes with it) in the ros-jazzy devshell — rmw-zenoh-rs cannot build under a plain Rust devshell (its build.rs needs ROS headers).
• Ran ./scripts/check-local.sh successfully. Not run as one command: rmw-zenoh-rs is outside the pure-Rust workspace subset that script covers on this environment. cargo test -p rmw-zenoh-rs --test no_parameter_services was run directly, both directions, above.