feat(java/driver/flight-sql): support flightsql:// URI scheme - #4539

[HidingField] Hiding fields of superclasses may cause confusion and errors. This field is hiding ArrowReader.allocator.

[EffectivelyPrivate] This declaration has public or protected modifiers, but is effectively private.

[EffectivelyPrivate] This declaration has public or protected modifiers, but is effectively private.

[ReferenceEquality] Comparison using reference equality instead of value equality

[EqualsGetClass] Prefer instanceof to getClass when implementing Object#equals. Note that this may be a behaviour change.

[EqualsGetClass] Prefer instanceof to getClass when implementing Object#equals. Note that this may be a behaviour change.

[ObjectsHashCodePrimitive] Objects.hashCode(Object o) should not be passed a primitive value

[EqualsGetClass] Prefer instanceof to getClass when implementing Object#equals. Note that this may be a behaviour change.

[OverrideThrowableToString] To return a custom message with a Throwable class, one should override getMessage() instead of toString().