Ensuring 1-to-1 match of seal closing method with bundles

[dr-orlovsky]

This disallows assignments to the same UTXO with conflicting closing methods (tapret+opret) since one type of them will be lost. However this fixes a potential attack where opret and tapret anchors are both present committing to different bundles inside the same witness transaction

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 43 lines in your changes are missing coverage. Please review.

Project coverage is 14.8%. Comparing base (94f8691) to head (fb08fb6).
Report is 25 commits behind head on v0.11.

Files	Patch %	Lines
src/contract/anchor.rs	0.0%	22 Missing ⚠️
src/validation/validator.rs	0.0%	21 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           v0.11    #229     +/-   ##
=======================================
+ Coverage   14.1%   14.8%   +0.7%     
=======================================
  Files         33      30      -3     
  Lines       4149    3794    -355     
=======================================
- Hits         585     560     -25     
+ Misses      3564    3234    -330     

Flag	Coverage Δ
rust	14.8% <0.0%> (+0.7%)	⬆️

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[dr-orlovsky]

Closing in favor of #230 #231 #232 #233