Improve test and typing coverage for Qubole Operator

[chattarajoy]

This provider also has poor typing coverage.
#9708 (comment)

Originally posted by @mik-laj in #9347 (comment)

[boring-cyborg]

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[chattarajoy]

Pls assign this to me

[chattarajoy]

assigned to @lordozb

[morrme]

Hello @eladkal and @vikramkoka !

It seems as though this operator now has ~94% coverage according to #9708 (comment)

[eladkal]

fixed in #11229