[CORE] Drop the now-constant ">= 3.4" test gates

`spark-3.4` is the lowest supported profile, so `testWithMinSparkVersion(name, "3.4")` is just `test(name)` with extra indirection. 57 call sites across 14 files, mostly in `ScalarFunctionsValidateSuite`, `DeltaSuite` and `JsonFunctionsValidateSuite`.

`testWithRangeSparkVersion` and `ignoreWithSpecifiedSparkVersion` in `GlutenQueryTest` have no callers either.

Gates on 3.5 / 4.0 / 4.1 are live and should stay. No behaviour change — the point is that every remaining version gate is then a real one.

Best done after #12981. Follow-up to #12807.

Start with GlutenQueryTest and the named call sites in ScalarFunctionsValidateSuite, DeltaSuite, and JsonFunctionsValidateSuite; inspect the 57 uses across the 14 files. Confirm the 3.4 gate is redundant, remove the unused helper methods with no callers, and leave the 3.5, 4.0, and 4.1 gates intact. Coordinate with the work in #12981 first.

Written by the indexing model from the issue text.