Let integration tests run in parallel (#2076)

## Which issue does this PR close?


- Closes #2075 .

## What changes are included in this PR?

Refactor integrationt-tests module so that they can run in parallel.

## Are these changes tested?

Yes, ut.

Author: liurenjie1024

…egration_tests/tests/shared_tests/mod.rs …es/integration_tests/tests/common/mod.rscrates/integration_tests/tests/shared_tests/mod.rs renamed to crates/integration_tests/tests/common/mod.rs crates/integration_tests/tests/shared_tests/mod.rs renamed to crates/integration_tests/tests/common/mod.rs

@@ -20,15 +20,10 @@ use std::collections::HashMap;
 use iceberg::spec::{NestedField, PrimitiveType, Schema, Type};
 use iceberg::{Catalog, CatalogBuilder, Namespace, NamespaceIdent};
 use iceberg_catalog_rest::RestCatalogBuilder;
-
-use crate::get_shared_containers;
-
-mod conflict_commit_test;
-mod read_evolved_schema;
-mod read_positional_deletes;
+use iceberg_integration_tests::get_test_fixture;
 
 pub async fn random_ns() -> Namespace {
-    let fixture = get_shared_containers();
+    let fixture = get_test_fixture();
     let rest_catalog = RestCatalogBuilder::default()
         .load("rest", fixture.catalog_config.clone())
         .await

…sts/shared_tests/conflict_commit_test.rs …tion_tests/tests/conflict_commit_test.rscrates/integration_tests/tests/shared_tests/conflict_commit_test.rs renamed to crates/integration_tests/tests/conflict_commit_test.rs crates/integration_tests/tests/shared_tests/conflict_commit_test.rs renamed to crates/integration_tests/tests/conflict_commit_test.rs

@@ -17,9 +17,12 @@
 
 //! Integration tests for rest catalog.
 
+mod common;
+
 use std::sync::Arc;
 
 use arrow_array::{ArrayRef, BooleanArray, Int32Array, RecordBatch, StringArray};
+use common::{random_ns, test_schema};
 use futures::TryStreamExt;
 use iceberg::transaction::{ApplyTransactionAction, Transaction};
 use iceberg::writer::base_writer::data_file_writer::DataFileWriterBuilder;
@@ -31,14 +34,12 @@ use iceberg::writer::file_writer::rolling_writer::RollingFileWriterBuilder;
 use iceberg::writer::{IcebergWriter, IcebergWriterBuilder};
 use iceberg::{Catalog, CatalogBuilder, TableCreation};
 use iceberg_catalog_rest::RestCatalogBuilder;
+use iceberg_integration_tests::get_test_fixture;
 use parquet::file::properties::WriterProperties;
 
-use crate::get_shared_containers;
-use crate::shared_tests::{random_ns, test_schema};
-
 #[tokio::test]
 async fn test_append_data_file_conflict() {
-    let fixture = get_shared_containers();
+    let fixture = get_test_fixture();
     let rest_catalog = RestCatalogBuilder::default()
         .load("rest", fixture.catalog_config.clone())
         .await

…ests/shared_tests/read_evolved_schema.rs …ation_tests/tests/read_evolved_schema.rscrates/integration_tests/tests/shared_tests/read_evolved_schema.rs renamed to crates/integration_tests/tests/read_evolved_schema.rs crates/integration_tests/tests/shared_tests/read_evolved_schema.rs renamed to crates/integration_tests/tests/read_evolved_schema.rs

@@ -23,13 +23,12 @@ use iceberg::expr::Reference;
 use iceberg::spec::Datum;
 use iceberg::{Catalog, CatalogBuilder, TableIdent};
 use iceberg_catalog_rest::RestCatalogBuilder;
+use iceberg_integration_tests::get_test_fixture;
 use ordered_float::OrderedFloat;
 
-use crate::get_shared_containers;
-
 #[tokio::test]
 async fn test_evolved_schema() {
-    let fixture = get_shared_containers();
+    let fixture = get_test_fixture();
     let rest_catalog = RestCatalogBuilder::default()
         .load("rest", fixture.catalog_config.clone())
         .await

…/shared_tests/read_positional_deletes.rs …n_tests/tests/read_positional_deletes.rscrates/integration_tests/tests/shared_tests/read_positional_deletes.rs renamed to crates/integration_tests/tests/read_positional_deletes.rs crates/integration_tests/tests/shared_tests/read_positional_deletes.rs renamed to crates/integration_tests/tests/read_positional_deletes.rs

@@ -20,12 +20,11 @@
 use futures::TryStreamExt;
 use iceberg::{Catalog, CatalogBuilder, TableIdent};
 use iceberg_catalog_rest::RestCatalogBuilder;
-
-use crate::get_shared_containers;
+use iceberg_integration_tests::get_test_fixture;
 
 #[tokio::test]
 async fn test_read_table_with_positional_deletes() {
-    let fixture = get_shared_containers();
+    let fixture = get_test_fixture();
     let rest_catalog = RestCatalogBuilder::default()
         .load("rest", fixture.catalog_config.clone())
         .await