JVET-Q0806 Geo related adoptions (JVET-Q0059, JVET-Q0077, JVET-Q0123, JVET-Q0188, JVET-Q0242_GEO, JVET-Q0309, JVET-Q0365 and JVET-Q0370)

1. enabling the encoder-side RD check of ISP mode when ACT is disabled at CU level
2. ACT intra RD code clean-up

This reverts commit 8e16ada0.

Use vectors and resize them if needed instead of deleting and
reallocating memory for every picture. This appears to have a
significant impact on decoder run time.

Use PLTRunMode type where appropriate instead of bool since
using vector<bool> creates a number of issues