Use clang-tidy config file from repo instead of default

[jmagman]

Validated --config= is no longer passed into the generated clang-tidy command (due to flutter/flutter#93279 I don't see the warnings from ci/lint.sh). When I run that clang-tidy command manually, I now see google- linter warnings:

shell/platform/darwin/macos/framework/Source/FlutterTextureRegistrar.mm:29:17: warning: do not create objects with +new [google-objc-avoid-nsobject-new] _textures = [NSMutableDictionary new]; ^~~~~~~~~~~~~~~~~~~~~~~~~ [[NSMutableDictionary alloc] init] 

Fixes flutter/flutter#93280

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