[SPARK-12029][SPARKR] Improve column functions signature, param check, tests, fix doc and add examples

shivaram sun-rui

Author: felixcheung <[email protected]>

Closes #10019 from felixcheung/rfunctionsdoc.

(cherry picked from commit 28e46ab)
Signed-off-by: Shivaram Venkataraman <[email protected]>

Author: felixcheung