[C++][Compute] Refactor Rank implementation

[pitrou]

Describe the enhancement requested

The Rank implementation currently mixes ties detection and rank computation in a single function CreateRankings. Separating those two concerns would hopefully 1) decrease the amount of generated code 2) help with the percentile rank implementation.

Component(s)

C++

[pitrou]

Issue resolved by pull request 45217
#45217