Proto: introduce a limit for the size of inbox/outbox messages
Context
Fixes #3116 (closed).
This MR introduces a limit on the size of the binary encoding of sc rollup inbox and outbox messages.
Manually testing the MR
CI, in particular :
dune exec src/proto_alpha/lib_protocol/test/unit/main.exe -- test "^\[Unit\] sc rollup inbox$"dune exec src/proto_alpha/lib_protocol/test/unit/main.exe -- test "^\[Unit\] sc rollup management protocol$"
Edited by Boubacar Sall