BigQueryValueCheckOperator derived from deprecated ValueCheckOperator

[dewaldabrie]

airflow.contrib.operators.bigquery_check_operator.BigQueryValueCheckOperator is derived from airflow.operators.check_operator.ValueCheckOperator but needs to be derived from airflow.operators.sql.SQLValueCheckOperator instead.

Until this is done, airflow generates a lot of warnings from this line of code.

[boring-cyborg]

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[turbaszek]

Related #9844

[dewaldabrie]

@turbaszek This is related indeed, but #9844 is for a PR into master branch where the location of the BigQueryValueCheckOperator is also changed. My PR is to fix it for 1.10 specifically.

[eladkal]

This will be fixed in #12677