Imporove validation of pipelines for time-series

[nicl-nno]

There are several flaws exists in validation of pipeline for time-series.

The possible corrections are:

1) Refactor has_no_data_flow_conflicts_in_ts_pipeline (https://github.com/nccr-itmo/FEDOT/blob/2d1d966b08a6d23b6f1a4ccf14c8ec0183281169/fedot/core/pipelines/validation_rules.py#L136) 2) Validate multi-variate pipelines (check all paths has lagged operations, etc)

[nicl-nno]

Можно в качестве хотфикса починить ситуацию с прямым соединением входного и выходного блоков, минуя lagged - уж больно часто это происходит.

[nicl-nno]

Examples of valid, but incorrect pipelines:

[nicl-nno]

Example of valid and correct, but not working:

[nicl-nno]

Done.