Handle limit pushdown in last cache

[hiltontj]

Problem statement

The last cache does not handle limit pushdown:

influxdb/influxdb3_cache/src/last_cache/table_function.rs

Line 76 in fa18b6d

_limit: Option<usize>,

Proposed solution

Handle limit pushdown in the last cache. This was done in the distinct cache, so the solution may be able to draw on the implementation there (see where limit is handled internally here).

The LastCacheExec, should output the limit pushed down to the table function scan, as was done for the distinct cache.

Additional context

See slack thread.