Http2 - node & validator attack techniques

5 techniques with a reproduced instance on Http2

NRDAX-T0064 - Endpoint Concurrency Cap Exhaustion (connection_exhaustion) active NRDAX-T0111 - HTTP/2 Rapid Reset Memory Exhaustion (network-p2p) active NRDAX-T0383 - HPACK Decoded-Size Accounting Bypass (memory_amp) active NRDAX-T0384 - HTTP/2 Continuation Frame Flood (compute_amp) active NRDAX-T0386 - Priority-Field Parse-Exception Leak (memory_amp) active