pgAdmin 4 commit: Make the query tool datatype test easilyconfigurable

Make the query tool datatype test easily configurable and extendable and add support for multi-dimensional arrays and enums.

Branch
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WEBPACK_DEVEL2

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=52c7945d4847ac835f3f3a04854e6b221767c4cd
Author: Harshal Dhumal 

Modified Files
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web/pgadmin/feature_tests/datatype_test.json       | 173 +++++++++++++++++
.../feature_tests/pg_datatype_validation_test.py   | 204 ++++++++++++++++-----
web/regression/feature_utils/pgadmin_page.py       |  13 ++
web/regression/python_test_utils/test_utils.py     |  18 ++
4 files changed, 359 insertions(+), 49 deletions(-)