fix: remote_control cannot be overridden (#2297)

### Problem
When configuration overrides are removed or changed for
`remote_control`, the automations previously registered by the card were
not updated, causing stale automations to remain active.

### Fix
Re-run the remote-control and automations loaders when the effective
configuration changes due to overrides so that automation
additions/removals reflect the current config.

#### What changed
- Modified: config-manager.ts
- Call `setKeyboardShortcutsFromConfig(this._api)`,
`setRemoteControlEntityFromConfig(this._api)` and
`setAutomationsFromConfig(this._api)` inside `_processOverrideConfig()`.
- Modified: `config-manager.test.ts`
- Added ConfigManager for test setup with real AutomationsManager and
ConditionStateManager
    - Added test constants to centralize test data
    - Expanded test coverage for override conditions:
        - loaders should re-run when overrides change 
        - remote-control loader with overrides

#### Testing
- Full test suite run locally: 229 files, 2852 tests — all passing (with
TZ forced to 'UTC') ✅

src/card-controller/config/config-manager.ts

@@ -108,10 +108,6 @@ export class ConfigManager {
     this._api.getMessageManager().reset();
     this._api.getStatusBarItemManager().removeAllDynamicStatusBarItems();
 
-    setKeyboardShortcutsFromConfig(this._api);
-    setRemoteControlEntityFromConfig(this._api);
-    setAutomationsFromConfig(this._api);
-
     this._processOverrideConfig();
 
     this._api.getCardElementManager().update();
@@ -132,6 +128,14 @@ export class ConfigManager {
     setFoldersFromConfig(this._api);
     this._api.getStyleManager().updateFromConfig();
 
+    // Ensure features that register automations or other side-effects from
+    // configuration are updated when overrides change (e.g. remote_control).
+    // Re-run loaders that may add/remove automations based on the current
+    // effective configuration.
+    setKeyboardShortcutsFromConfig(this._api);
+    setRemoteControlEntityFromConfig(this._api);
+    setAutomationsFromConfig(this._api);
+
     if (
       previousConfig &&
       (!isEqual(previousConfig?.cameras, this._overriddenConfig?.cameras) ||