Support calculating network memory for forward and rescale edge

This is follow up Jira of FLINK-34471.

FLINK-34471 assuming all connections type are ALL_TO_ALL. This Jira will optimize it to save some network memory for forward and rescale connection.

Following is the optimization logic:

• When the connection type is FORWARD and the parallelism of 2 tasks are same. We calculate network memory based on FORWARD connection.
• When the connection type is FORWARD and the parallelism of 2 tasks are not same. We calculate network memory based on RESCALE connection.
• When the connection type is RESCALE. We calculate network memory based on RESCALE connection.