Improve liquidity ads codec performance

[t-bast]

We improve the performance of the liquidity ads codec by ignoring unknown payment types, and simply checking whether the payment types we support are activated or not. We keep the unparsed bits as an encoded blob, like we do for unknown features.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 92.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.63%. Comparing base (d769db0) to head (52bb6f4).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...main/scala/fr/acinq/eclair/router/Validation.scala	33.33%	2 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3344      +/-   ##
==========================================
- Coverage   88.64%   88.63%   -0.02%     
==========================================
  Files         222      222              
  Lines       21910    21917       +7     
  Branches      867      883      +16     
==========================================
+ Hits        19423    19426       +3     
- Misses       2487     2491       +4     

Files with missing lines	Coverage Δ
...a/fr/acinq/eclair/wire/protocol/LiquidityAds.scala	95.29% <100.00%> (+0.11%)	⬆️
...main/scala/fr/acinq/eclair/router/Validation.scala	92.85% <33.33%> (-0.50%)	⬇️

... and 5 files with indirect coverage changes

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