ci: install cbor2 on Packit

[evverx]

to prevent the newly introduced CBOR tests from failing with:

 ###(090)=[failed] Interop: Large unsigned integer

 >>> large_int = 18446744073709551615  # 2^64 - 1
 >>> encoded = cbor2.dumps(large_int)
 NameError: name 'cbor2' is not defined

and so on.

It was tested in https://copr.fedorainfracloud.org/coprs/packit/evverx-scapy-2/build/10238626/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.47%. Comparing base (5b81ba1) to head (f28fc3e).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4948      +/-   ##
==========================================
- Coverage   80.08%   79.47%   -0.61%     
==========================================
  Files         379      361      -18     
  Lines       93102    92811     -291     
==========================================
- Hits        74557    73764     -793     
- Misses      18545    19047     +502     

see 295 files with indirect coverage changes

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[gpotter2]

Thanks for the PR !

[evverx]

FWIW s390x jobs get stuck because of fedora-copr/copr#4219.

I did run the CBOR tests on big-endian machines though and they passed there.