feat: enforce ordering of allowance check

[obycode]

@jcnelson pointed out that the SIP states that the allowances are checked in declaration order, but my original implementation was only preserving order within each kind of asset movement, not overall. This fixes that.

[jcnelson]

LGTM as long as CI passes. Thanks!

[jferrant]

It took me an embarrassing amount of time to figure out what was happening in this PR. I was confused, got a tea, reread and went "oh....Caffeine has made it clear."

LGTM!

[codecov]

Codecov Report

❌ Patch coverage is 76.81159% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.49%. Comparing base (7762d88) to head (4fb73a0).
⚠️ Report is 52 commits behind head on develop.

Files with missing lines	Patch %	Lines
clarity/src/vm/tests/post_conditions.rs	50.00%	16 Missing ⚠️

❌ Your project status has failed because the head coverage (66.49%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

❗ There is a different number of reports uploaded between BASE (7762d88) and HEAD (4fb73a0). Click for more details.

HEAD has 6 uploads less than BASE

Flag	BASE (7762d88)	HEAD (4fb73a0)
	140	134

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #6602       +/-   ##
============================================
- Coverage    79.96%   66.49%   -13.47%     
============================================
  Files          571      571               
  Lines       351591   351623       +32     
============================================
- Hits        281135   233805    -47330     
- Misses       70456   117818    +47362     

Files with missing lines	Coverage Δ
clarity/src/vm/functions/post_conditions.rs	89.68% <100.00%> (+8.12%)	⬆️
clarity/src/vm/tests/post_conditions.rs	64.18% <50.00%> (-35.82%)	⬇️

... and 340 files with indirect coverage changes

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