Add I2R and R2I 11az LTF repetition count

Add IEEE 802.11az LTF repetition count for both I2R and R2I in 11az
RTT ranging result. Also remove the LTF repetition count from RTT
capabilities and config. The reason for removing is that vendor
software can pick the optimized value without an input from
framework.

Bug: 295619650
Test: m
Change-Id: I54b3ba9f490a9de83ac63b1dcde1e1cb4e1bd8fc