Fix overflowing in intersection_intermediates.remove_if

[isVoid]

Description

EDIT: the thrust bug is a known issue. Tracked by NVIDIA/cccl#153

This PR fixes an issue in remove_if. Strangely, when calling reduce_by_key with iterator to integer,
and when using thrust::plus<index_t>(), even if by definition the argument type of the plus operator is strongly typed
with a higher bit width integer type, and I expected that the flags (uint8_t) were cast to the higher
bit depth before addition, the overflow still happens. I have filed a thread in the thrust channel to discuss if this
is a bug in thrust.

Meanwhile, a quick WAR is to explicitly use a transform iterator to cast the uchar in to index_t before adding.
This should give the correct result.

Fixes #1200
Depend on #1207

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[thomcom]

/merge