Fix rn config file load codegen (facebook#34895)

Summary:
Resolves facebook#34894

## Changelog

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[General][Fixed] - Load react-native.config.js from correct path during codegen

Pull Request resolved: facebook#34895

Test Plan:
Command line output after fix with extra console logs to show the correctness ( hopefully :) ) of the fix.

```bash
 ~/repos/sentry-react-native � � krystofwoldrich/multipleRNsamples ± �node node_modules/react-native/scripts/generate-artifacts.js --path sample-new-architecture --outputPath codegen
[Codegen] Processing react-native core libraries
[Codegen] Found react-native

[Codegen] >>>>> Searching for codegen-enabled libraries in /Users/krystofwoldrich/repos/sentry-react-native/node_modules

[Codegen] >>>>> Searching for codegen-enabled libraries in react-native.config.js
cwd /Users/krystofwoldrich/repos/sentry-react-native
rnConfigFilePath sample-new-architecture/react-native.config.js
rnConfigFilePath - resolved /Users/krystofwoldrich/repos/sentry-react-native/sample-new-architecture/react-native.config.js
[Codegen] Found sentry/react-native

[Codegen] >>>>> Searching for codegen-enabled libraries in the app

[Codegen] >>>>> Processing FBReactNativeSpec
[Codegen] Generated schema: /var/folders/tl/jddrmdy97gj0cljrcwb_qkzc0000gn/T/FBReactNativeSpecrHeknw/schema.json
[Codegen] Generated artifacts: codegen/build/generated/ios

[Codegen] >>>>> Processing rncore
[Codegen] Generated schema: /var/folders/tl/jddrmdy97gj0cljrcwb_qkzc0000gn/T/rncorehCjmlJ/schema.json
[Codegen] Generated artifacts: codegen/build/generated/ios

[Codegen] >>>>> Processing RNSentrySpec
[Codegen] Generated schema: /var/folders/tl/jddrmdy97gj0cljrcwb_qkzc0000gn/T/RNSentrySpectMmDpf/schema.json
[Codegen] Generated artifacts: codegen/build/generated/ios

>>>>> Creating component provider
Generated schema list: /var/folders/tl/jddrmdy97gj0cljrcwb_qkzc0000gn/T/rn-tmp-schema-list.json
Generated provider in: codegen/build/generated/ios

[Codegen] Done.
```

Reviewed By: rshest

Differential Revision: D40177746

Pulled By: rshest

fbshipit-source-id: 970f016db26fda003ee3b47d50e80549fdb88415

scripts/codegen/generate-artifacts-executor.js

@@ -216,7 +216,7 @@ function handleLibrariesFromReactNativeConfig(
     `\n\n[Codegen] >>>>> Searching for codegen-enabled libraries in ${rnConfigFileName}`,
   );
 
-  const rnConfigFilePath = path.join(appRootDir, rnConfigFileName);
+  const rnConfigFilePath = path.resolve(appRootDir, rnConfigFileName);
 
   if (fs.existsSync(rnConfigFilePath)) {
     const rnConfig = require(rnConfigFilePath);