[R-package] Fix R memory leaks (fixes #4282, fixes #3462)#4597

Merged

StrikerRUS merged 8 commits intomicrosoft:masterfrom david-cortes:Rleaks

Sep 17, 2021

+134-100

Commits on Sep 6, 2021

Commits on Sep 7, 2021

Commits on Sep 10, 2021

Merge github.com:microsoft/lightgbm into Rleaks
david-cortes
committed

Commits on Sep 12, 2021