Remove the new sdk check and populate json for track 1 package

[sima-zhu]

We currently do not populate {package}.json file for track 1 packages which is used to release step to read package properties.

However, we expect to support all packages which utilize our pipeline to release.

The PR is to remove the new_sdk check so that we generate and publish json file whenever they go through our pipelines.

The change failed at reading line from msbuild command. We are lack of ability to tell which line is "introduction message" , which line actually reading the package info.

Here is fix: Azure/azure-sdk-for-net#24950

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[weshaggard]

The change looks good. Can you please do some local testing to run this for each of our repos. You should be able to have it generate a json file for all libraries in the entire repo by passing in empty for the service directory.

[sima-zhu]

@weshaggard Below shows my local generated files

The mgmt packages are able to generate.

[weshaggard]

@sima-zhu I'm mostly wanted to ensure that the json files we wheren't generating before actually generate successfully and look as expected.

[sima-zhu]

@weshaggard I have simply verified in python repo.
The one with new_sdk check has 204 total json files
The one without new_sdk check has 266 total json files

We have azure-keyvault.json generated using current change as below:

[weshaggard]

OK please double check at least .NET repo as well, in particular the issue we saw earlier today

[sima-zhu]

My machine is out of date for dotnet tools. Will update my local and paste the result here later.

[sima-zhu]

@weshaggard
Total json files:
With current changes: 150
Without current changes: 106

WebPubsub Common is here:

[sima-zhu]

.NET failed:
https://dev.azure.com/azure-sdk/public/_build/results?buildId=1161607&view=logs&j=7e6a3fb7-dbfe-5169-4db8-92b72295ba6c&t=b3666bad-9d51-538e-fb20-3d48596f46c5

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[ghost]

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