feat: implement get_view_names() method

[IlyaFaer]

Closes#303

[IlyaFaer]

@asthamohta, this also adds small changes to make the test suites ignore SQLAlchemy 2.0 as it includes a lot of breaking changes.

One strange thing I noticed is that the SQL query

SELECT table_name
FROMinformation_schema.views

Returns lists of strings. Is the information_schema.views.table_name field has the correct type? It feels like it's type is ARRAY<STRING>, not just STRING.

[gcf-merge-on-green]

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[yu-iskw]

I don't know what kokoro is like at all. However, according to the error message, it was failed due to timeout apparently.

ERROR: Aborting VM command due to timeout of 10800 seconds

[yu-iskw]

@asthamohta Is there anything I can help? I would like to go ahead with the issue.