Avoid reordering add-on repositories on Backup load (#5595)

* Avoid reordering add-on repositories on Backup load

The `ensure_builtin_repositories` function uses a set to deduplicate
items, which sometimes led to a change of order in elements. This is
problematic when deduplicating Backups.

Simply avoid mangling the list of add-on repositories on load. Instead
rely on `update_repositories` which uses the same function to ensure
built-in repositories when loading the store configuration and restoring
a backup file.

* Update tests

* ruff format

* ruff check

* ruff check fixes

* ruff format

* Update tests/store/test_validate.py

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Simplify test

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

tests/store/test_validate.py

@@ -1,45 +1,14 @@
 """Test schema validation."""
 
-from typing import Any
-
 import pytest
 from voluptuous import Invalid
 
-from supervisor.const import ATTR_REPOSITORIES
-from supervisor.store.validate import SCHEMA_STORE_FILE, repositories
-
-
-@pytest.mark.parametrize(
-    "config",
-    [
-        {},
-        {ATTR_REPOSITORIES: []},
-        {ATTR_REPOSITORIES: ["https://github.com/esphome/home-assistant-addon"]},
-    ],
-)
-async def test_default_config(config: dict[Any]):
-    """Test built-ins included by default."""
-    conf = SCHEMA_STORE_FILE(config)
-    assert ATTR_REPOSITORIES in conf
-    assert "core" in conf[ATTR_REPOSITORIES]
-    assert "local" in conf[ATTR_REPOSITORIES]
-    assert "https://github.com/hassio-addons/repository" in conf[ATTR_REPOSITORIES]
-    assert (
-        len(
-            [
-                repo
-                for repo in conf[ATTR_REPOSITORIES]
-                if repo == "https://github.com/esphome/home-assistant-addon"
-            ]
-        )
-        == 1
-    )
+from supervisor.store.validate import repositories
 
 
 @pytest.mark.parametrize(
     "repo_list,valid",
     [
-        ([], True),
         (["core", "local"], True),
         (["https://github.com/hassio-addons/repository"], True),
         (["not_a_url"], False),
@@ -49,15 +18,7 @@ async def test_default_config(config: dict[Any]):
 async def test_repository_validate(repo_list: list[str], valid: bool):
     """Test repository list validate."""
     if valid:
-        processed = repositories(repo_list)
-        assert len(processed) == 5
-        assert set(repositories(repo_list)) == {
-            "core",
-            "local",
-            "https://github.com/hassio-addons/repository",
-            "https://github.com/esphome/home-assistant-addon",
-            "https://github.com/music-assistant/home-assistant-addon",
-        }
+        assert repositories(repo_list) == repo_list
     else:
         with pytest.raises(Invalid):
             repositories(repo_list)