fix(MToken): handle mint reverts in Portal

[PierrickGT]

Bridge PR: https://github.com/m0-foundation/bridge-prototypes/pull/7

[github-actions]

LCOV of commit 09ddadf during Forge Coverage #585

Summary coverage rate:
  lines......: 96.4% (107 of 111 lines)
  functions..: 92.9% (39 of 42 functions)
  branches...: no data found

Files changed coverage rate:
                                     |Lines       |Functions  |Branches    
  Filename                           |Rate     Num|Rate    Num|Rate     Num
  =========================================================================
  src/MToken.sol                     |97.7%     87|96.2%    26|    -      0

[deluca-mike]

My concern with this PR is still that:

• adds more diff than necessary from main to spoke
• removes checks in an immutable contract in favour of checks in a mutable contract (Portal)
• creates some coupling between SpokeMToken and a certain upgradeable version of Portal

IMO, we should keep these checks and just also check on the send side.

[PierrickGT]

Closed for the following reasons: #189 (review)