Add missing defusedxml

[fwfichtner]

• adds defusedxml to msi_reader extra
• adds new extra avhrr_l1b_eps because it was also missing defusedxml

Feel free to cherry-pick if you don't like the new reader.

• Closes 'defusedxml' missing in "msi_safe" extras #2759
• Tests added

[mraspaud]

LGTM, thanks for stepping in! One thing though, could you add your name to the authors file?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.92%. Comparing base (85d9117) to head (45f918e).
Report is 34 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2761      +/-   ##
==========================================
- Coverage   95.94%   95.92%   -0.03%     
==========================================
  Files         375      377       +2     
  Lines       53293    53468     +175     
==========================================
+ Hits        51130    51287     +157     
- Misses       2163     2181      +18     

Flag	Coverage Δ
behaviourtests	4.11% <ø> (-0.02%)	⬇️
unittests	96.01% <ø> (-0.03%)	⬇️

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[coveralls]

Pull Request Test Coverage Report for Build 8278663645

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.999%

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Totals
Change from base Build 8205996229:	0.0%
Covered Lines:	51159
Relevant Lines:	53291

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💛 - Coveralls

[mraspaud]

LGTM