Remove legacy symbol utils

[xlauko]

No description provided.

[github-actions]

Cpp-Linter Report ⚠️

Some files did not pass the configured checks!

clang-format (v19.1.1) reports: 7 file(s) not formatted

• include/vast/Dialect/Core/Interfaces/SymbolInterface.hpp
• include/vast/Dialect/Core/Interfaces/SymbolTableInterface.hpp
• include/vast/Dialect/Core/SymbolTable.hpp
• include/vast/Dialect/Meta/MetaDialect.hpp
• lib/vast/Dialect/Core/SymbolTable.cpp
• lib/vast/Dialect/Meta/MetaDialect.cpp
• tools/vast-query/vast-query.cpp

clang-tidy (v19.1.1) reports: 2 concern(s)

• include/vast/Dialect/Core/Interfaces/SymbolInterface.hpp:31:10: error: [clang-diagnostic-error]

  'vast/Dialect/Core/Interfaces/SymbolInterface.h.inc' file not found

     31 | #include "vast/Dialect/Core/Interfaces/SymbolInterface.h.inc"
        |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• include/vast/Dialect/Meta/MetaDialect.hpp:17:10: error: [clang-diagnostic-error]

  'vast/Dialect/Meta/MetaDialect.h.inc' file not found

     17 | #include "vast/Dialect/Meta/MetaDialect.h.inc"
        |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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