JVET-R0264: IRAP constraint

Fix for ticket #1429: Temporal Filter does not work with field coding

See merge request !1965

Add support for pps_single_slice_per_subpic_flag in subpicMergeApp

See merge request jvet/VVCSoftware_VTM!1963

Remove duplication of temporal filter parameters

See merge request !1964

Clean up after !1885 to avoid unnecessary processing

See merge request !1962

Ticket #1433: Mark GDR with RecoveryPocCnt==0 as immediately decodable picture

See merge request !1960

JVET-T0064: Addition of ALF filter strength control to VTM

See merge request !1918

Fix #1431: Avoid clipping after inverse transform when RExt__HIGH_BIT_DEPTH_SUPPORT is enabled

See merge request !1959

Update output YUV shift if the bitdepth changes between two sequences.

See merge request !1953

Also added parameters ALFAllowPredefinedFilters and CCALFStrength and note on that that refinement of quantized filter coefficients not is used.

Fix potential race condition when frame field information SEI arrives before picture timing SEI

See merge request !1958

Picture Timing SEI is intentionally not used in parsing of frame field information SEI.

In the existing code retrieving the picture timing SEI from HRD could return a nullptr, when the SEI has
not arrived yet. The pointer is dereferenced without checking and passed into frame field info SEI parsing
function and used for a consistency check.

This refactoring moves the check after parsing of all SEI messages.

JVET-R0046 aspect2

Also added parameters ALFAllowPredefinedFilters and CCALFStrength and note on that that refinement of quantized filter coefficients not is used.