Fixed various issues with num_frames

[ViktorM]

• Fixed max_frames interaction with max_epochs
• Linear LR schedule is now working properly with max_frames
• Added max_frames support to SAC
• Fixed old SAC configs
• Adresses https://github.com/Denys88/rl_games/issues/212

[Denys88]

looks good, if it is a fix for the ticket https://github.com/Denys88/rl_games/issues/212 please add info about it too.

[ViktorM]

Added