fix: decode Http error using proto3-JSON-serializer

[summer-ji-eng]

Using proto3-json-serializer to parse HTTP error json; example error return from http request:

const json = {
      error: {
        code: 403,
        message:
          'Cloud Translation API has not been used in project 123 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/translate.googleapis.com/overview?project=455411330361 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.',
        status: 'PERMISSION_DENIED',
        details: [{
'@type': 'type.googleapis.com/google.rpc.ErrorInfo',
      reason: 'SERVICE_DISABLED',
      domain: 'googleapis.com',
      metadata: {
        service: 'translate.googleapis.com',
        consumer: 'projects/123',
      },}],
      },
    };

Example of error.statusDetails

example	before	after
--	statusDetails: [ {'@type': 'type.googleapis.com/google.rpc.ErrorInfo',metadata: [Object],reason: 'SERVICE_DISABLED', domain: 'googleapis.com'}]	statusDetails: [ErrorInfo {metadata: [Object], reason: 'SERVICE_DISABLED', domain: 'googleapis.com'}]

[summer-ji-eng]

I am getting lazy to fix the Typescript Type linter issue in this PR since it raise up along with the build. But please let me know if we need to split into another PR. Thank you @alexander-fenster .

[alexander-fenster]

It's OK to have it here. Thank you!