VP8: do not forward RTP packets which payload contains a higher temporal layer than current one. #4834

Job	Run time
ci (ubuntu-20.04, gcc, g++, true, true, false, true, 22, Release)	23m 37s
ci (ubuntu-20.04, gcc, g++, true, true, false, true, 22, Debug)	21m 31s
ci (ubuntu-20.04, clang, clang++, true, true, true, true, 22, Release)	30m 5s
ci (ubuntu-20.04, clang, clang++, true, true, true, true, 22, Debug)	25m 30s
ci (ubuntu-22.04, gcc, g++, true, false, true, 22, Release)	20m 52s
ci (ubuntu-22.04, gcc, g++, true, false, true, 22, Debug)	19m 3s
ci (ubuntu-22.04, clang, clang++, true, true, true, 22, Release)	31m 51s
ci (ubuntu-22.04, clang, clang++, true, true, true, 22, Debug)	27m 8s
ci (ubuntu-24.04, gcc, g++, true, true, false, true, 22, Release)	20m 3s
ci (ubuntu-24.04, gcc, g++, true, true, false, true, 22, Debug)	17m 38s
ci (ubuntu-24.04, clang, clang++, true, true, true, true, 22, Release)	34m 41s
ci (ubuntu-24.04, clang, clang++, true, true, true, true, 22, Debug)	30m 24s
ci (macos-13, gcc, g++, true, false, false, false, 22, Release)	14m 12s
ci (macos-13, gcc, g++, true, false, false, false, 22, Debug)	12m 49s
ci (macos-14, clang, clang++, true, false, false, false, 22, Release)	7m 14s
ci (macos-14, clang, clang++, true, false, false, false, 22, Debug)	4m 24s
ci (macos-15, clang, clang++, true, false, false, false, 22, Release)	5m 46s
ci (macos-15, clang, clang++, true, false, false, false, 22, Debug)	6m 6s
ci (windows-2022, cl, cl, false, false, false, 22, Release)	8m 11s
ci (windows-2022, cl, cl, false, false, false, 22, Debug)	7m 12s
	6h 8m 17s

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