Fixed Failing tests in arithmetic_ops_tests for Spark 4.0.0 [databric…

…ks] (#11044)

* Fixed arithmetic_ops_tests

* Signing off

Signed-off-by: Raza Jafri <rjafri@nvidia.com>

* Added a mechanism to add ansi mode per test

* Reverted unnecessary change to spark_init_internal.py

* Corrected the year in the licence

* Only set ansi conf to false when ansi_mode_disabled is set

* Addressed review comments

* Fixed the method name

* Update integration_tests/src/main/python/conftest.py

This handles cases like `cache_test.py` which should run with the default conf for `spark.sql.ansi.enabled`.

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Signed-off-by: Raza Jafri <rjafri@nvidia.com>
Co-authored-by: MithunR <mythrocks@gmail.com>