Remove misleading CommonInst::method

[Lipen]

This PR removes the misleading val method: CommonMethod accessor in CommonInst. Instead, the user should use inst.location.method, if he wants the method in which the statement is located. For call statements, stmt.method typically denotes the callee, which was confused with inst.method until this PR.

This PR also removes the unused InstList interface.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.83%. Comparing base (4ba634a) to head (5099ce6).
⚠️ Report is 1 commits behind head on neo.

Files with missing lines	Patch %	Lines
...ain/kotlin/org/jacodb/impl/cfg/JcBlockGraphImpl.kt	0.00%	2 Missing ⚠️
.../main/kotlin/org/jacodb/ets/utils/BlockCfgToDot.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##                neo     #333   +/-   ##
=========================================
  Coverage     69.82%   69.83%           
  Complexity     2491     2491           
=========================================
  Files           275      275           
  Lines         15557    15556    -1     
  Branches       2342     2342           
=========================================
  Hits          10863    10863           
+ Misses         3769     3768    -1     
  Partials        925      925           

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[github-actions]

Test Results

  215 files  ±0    215 suites  ±0   15m 46s ⏱️ -4s
  711 tests ±0    699 ✅ ±0  12 💤 ±0  0 ❌ ±0 
1 977 runs  ±0  1 927 ✅ ±0  50 💤 ±0  0 ❌ ±0 

Results for commit 5099ce6. ± Comparison against base commit 4ba634a.

♻️ This comment has been updated with latest results.