http-client-java, improve error diagnostics for spotless failure

[weidongxu-microsoft]

The failure is usually due to Java syntax problem. We want to print the file name and content for better diagnostics.

Sample output of this PR.

[main] ERROR com.microsoft.typespec.http.client.generator.TypeSpecPlugin - Failed to format file 'src/main/java/azure/clientgenerator/core/usage/implementation/ModelInOperationsImpl.java'
177:15: error: illegal unicode escape
174 
175     /**
176      * Serialize the 'OrphanModel' as request body.
177      * data\userdomain
178      * 
179      * Expected body parameter: 
180      * ```json

I've also add logic to parse the JAR output to diagnostics/trace for tsp.

autorest.java Azure/autorest.java#3035

[azure-sdk]

❌ There is undocummented changes. Run chronus add to add a changeset or click here.

The following packages have changes but are not documented.

• ❌@typespec/http-client-java

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[azure-sdk]

You can try these changes here

🛝 Playground	🌐 Website	🛝 VSCode Extension

[weidongxu-microsoft]

I've got to merge it early, as I've put some fix for nightly build here as well 8eefe15

I will handle any feedback in separate PR.

[srnagar]

Nice! This is super useful to troubleshoot quickly. Knowing which file is not syntactically correct helps in knowing where the issue is.