refactor: consume the config-file writer from stackable-operator

Replace the vendored Java-properties writer
(rust/operator-binary/src/framework/writer.rs) with
stackable_operator::v2::config_file_writer (moved there via operator-rs
#1217 on the smooth-operator branch). ZooKeeper's copy was a java-only
subset of the canonical hdfs writer; the upstream module's additional
to_hadoop_xml simply goes unimported. Drop the now-unused java-properties
dependency. The framework module now only contains role_utils.

No behaviour change; rendered .properties output is byte-identical by
construction (same code, new home).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: adwk67

Cargo.lock

@@ -19,7 +19,6 @@ const_format = "0.2"
 fnv = "1.0"
 futures = { version = "0.3", features = ["compat"] }
 indoc = "2.0"
-java-properties = "2.0"
 pin-project = "1.1"
 semver = "1.0"
 serde = { version = "1.0", features = ["derive"] }

Cargo.nix

@@ -18,7 +18,6 @@ const_format.workspace = true
 fnv.workspace = true
 futures.workspace = true
 indoc.workspace = true
-java-properties.workspace = true
 pin-project.workspace = true
 semver.workspace = true
 serde.workspace = true

Cargo.toml

@@ -10,4 +10,3 @@
 // Wired into the reconciler in a follow-up commit (validate -> ValidatedCluster).
 #[allow(dead_code)]
 pub mod role_utils;
-pub mod writer;

rust/operator-binary/Cargo.toml

@@ -12,11 +12,11 @@ use stackable_operator::{
     builder::{configmap::ConfigMapBuilder, meta::ObjectMetaBuilder},
     k8s_openapi::api::core::v1::ConfigMap,
     role_utils::RoleGroupRef,
+    v2::config_file_writer::{PropertiesWriterError, to_java_properties_string},
 };
 
 use crate::{
     crd::{ZookeeperRole, v1alpha1},
-    framework::writer::{PropertiesWriterError, to_java_properties_string},
     utils::build_recommended_labels,
     zk_controller::{
         ZK_CONTROLLER_NAME,

rust/operator-binary/src/framework.rs

@@ -33,7 +33,7 @@ pub(crate) fn resolved_overrides(
 }
 
 /// Converts a `key -> value` map into the `key -> Some(value)` shape expected by
-/// [`to_java_properties_string`](crate::framework::writer::to_java_properties_string).
+/// [`to_java_properties_string`](stackable_operator::v2::config_file_writer::to_java_properties_string).
 pub(crate) fn into_optional_values(
     map: BTreeMap<String, String>,
 ) -> BTreeMap<String, Option<String>> {