feature(dev-middleware): add inspector proxy nativeNetworkInspection target capabilty flag (#43310)

Summary:
This adds the `nativeNetworkInspection` target capability flag, to enable/disable the proxy-side network inspection handling.

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[GENERAL][ADDED] Add inspector proxy `nativeNetworkInspection` target capability flag

Pull Request resolved: https://github.com/facebook/react-native/pull/43310

Test Plan:
Once this lands, and is published through `react-native/dev-middleware`, we (Expo) can disable the proxy-side network inspection handling.

See https://github.com/expo/expo/pull/27425/commits/1a1b601a29fbc5766628238db7259121689f6cd6 on PR expo/expo#27425

Reviewed By: christophpurrer, motiz88

Differential Revision: D54486516

Pulled By: huntie

fbshipit-source-id: cc151349c816fb3866d3ec07af1a29a5f4ff9b00

packages/dev-middleware/src/inspector-proxy/types.js

@@ -30,6 +30,13 @@ export type TargetCapabilityFlags = $ReadOnly<{
    * In the proxy, this disables source fetching emulation and host rewrites.
    */
   nativeSourceCodeFetching?: boolean,
+
+  /**
+   * The target supports native network inspection.
+   *
+   * In the proxy, this disables intercepting and storing network requests.
+   */
+  nativeNetworkInspection?: boolean,
 }>;
 
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