Related to #62741 #56640

The issue is happened to parts with constant index granularity and triggered by having PREWHERE in the query.
So, having a MergeTree table with index_granularity_bytes = 0, index_granularity = 42 settings and 1 row, and reading it, will trigger the following error:
RangeReader read 1 rows, but 42 expected

Technically, MergeTreeIndexGranularityInfo::fixed_index_granularity

is used to initialize MergeTreeIndexGranularityConstant::last_mark_granularity (it's 42 in our example)
Which in turn used to get the number of rows in the part range (one only in our example, i.e. last as well) in MergeTreeIndexGranularityConstant::getRowsCountInRange()

CC @CurtizJ, fill free to use this PR for the fix if applicable

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