Feat: remove old parser

[brice-stacks]

This removes the v1 parser. We'll need to verify that block validation or genesis sync still works with this change in place.

[codecov]

Codecov Report

❌ Patch coverage is 96.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 72.61%. Comparing base (8826d5c) to head (88c593d).
⚠️ Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
clarity/src/vm/ast/mod.rs	88.88%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6754      +/-   ##
===========================================
- Coverage    76.58%   72.61%   -3.97%     
===========================================
  Files          580      579       -1     
  Lines       361096   360363     -733     
===========================================
- Hits        276555   261695   -14860     
- Misses       84541    98668   +14127     

Files with missing lines	Coverage Δ
...ity/src/vm/analysis/type_checker/v2_1/tests/mod.rs	90.34% <ø> (-9.42%)	⬇️
clarity/src/vm/ast/definition_sorter/tests.rs	100.00% <100.00%> (ø)
clarity/src/vm/tests/contracts.rs	100.00% <100.00%> (ø)
stackslib/src/chainstate/stacks/db/transactions.rs	87.94% <100.00%> (-9.01%)	⬇️
stackslib/src/chainstate/tests/mod.rs	76.09% <ø> (-1.85%)	⬇️
stackslib/src/net/api/callreadonly.rs	91.21% <100.00%> (ø)
stackslib/src/net/api/fastcallreadonly.rs	91.28% <100.00%> (ø)
stackslib/src/net/api/getconstantval.rs	41.93% <100.00%> (-50.00%)	⬇️
stackslib/src/net/api/getdatavar.rs	88.97% <100.00%> (ø)
stackslib/src/net/api/getistraitimplemented.rs	92.07% <100.00%> (+0.19%)	⬆️
... and 4 more

... and 282 files with indirect coverage changes

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[jacinta-stacks]

Definitely got a lot of failing unit tests. I assume related to trying ot call non existent parser v1 code and defaultint to the new so error types are prob diff.