migrate bigquerydataset to new API

[xiaoweim]

The New BigQuery API does not support the field isCaseSensitive.

Update: Filed a feature request with the bigquery team and the field has been added. Reference PR: googleapis/google-cloud-go#11216. Reference BigQuery version: https://github.com/googleapis/google-cloud-go/releases/tag/bigquery/v1.65.0

• Run make ready-pr to ensure this PR is ready for review.
• Perform necessary E2E testing for changed resources.

[google-oss-prow]

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[xiaoweim]

/assign @jingyih

[jingyih]

Not sure I follow, what does hasUpdateIsCaseInsensitive do?

[xiaoweim]

In go, explicitly set a bool value to false and not setting it (it defaults to false), there is not a method to tell the difference. I added it here to tell if the update has explicitly set the value to false, therefore I should update this field. Or it only defaults to false, where I should not be updating it.

[jingyih]

Github diff tool is not working correctly. The actual diff on http log:

_http5.log
_http6.log
_http7.log