Release-candidate v0.68.3-rc.3

[jansegre]

Changes

• fix: nc-fail should not count for excluding conflicts from mempool #1532

Checklist

• I've read and followed the release candidate process described in https://github.com/HathorNetwork/ops-tools/blob/master/docs/release-guides/hathor-core.md#release-candidate
• I confirm this release candidate only includes production-ready changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.19%. Comparing base (40f8953) to head (3963e25).
⚠️ Report is 2 commits behind head on release-candidate.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           release-candidate    #1527      +/-   ##
=====================================================
- Coverage              86.19%   86.19%   -0.01%     
=====================================================
  Files                    437      437              
  Lines                  33724    33725       +1     
  Branches                5267     5267              
=====================================================
  Hits                   29069    29069              
- Misses                  3643     3644       +1     
  Partials                1012     1012              

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