feat: upgrade host llvm from 18 to 19

[antonbaliasnikov]

Upgrade host LLVM from 18 to 19 to correspond to the Rust version used in builds:

rustc 1.82.0 (f6e511eec 2024-10-15)
binary: rustc
commit-hash: f6e511eec7342f59a25f7c0534f1dbea00d01b14
commit-date: 2024-10-15
host: aarch64-apple-darwin
release: 1.82.0
LLVM version: 19.1.1

[antonbaliasnikov]

Related to matter-labs/era-compiler-solidity#196

[antonbaliasnikov]

Building our fork with LLVM 19 is now fails with an error:

[329/2421] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/ConstantFold.cpp.o
FAILED: lib/IR/CMakeFiles/LLVMCore.dir/ConstantFold.cpp.o
/usr/lib/llvm-19/bin/clang++ -DGTEST_HAS_RTTI=0 -D_ERAVM -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/era-compiler-solidity/target-llvm/build-final/lib/IR -I/era-compiler-solidity/llvm/llvm/lib/IR -I/era-compiler-solidity/target-llvm/build-final/include -I/era-compiler-solidity/llvm/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -std=c++17 -MD -MT lib/IR/CMakeFiles/LLVMCore.dir/ConstantFold.cpp.o -MF lib/IR/CMakeFiles/LLVMCore.dir/ConstantFold.cpp.o.d -o lib/IR/CMakeFiles/LLVMCore.dir/ConstantFold.cpp.o -c /era-compiler-solidity/llvm/llvm/lib/IR/ConstantFold.cpp
/era-compiler-solidity/llvm/llvm/lib/IR/ConstantFold.cpp:117:21: error: variable 'SrcTy' set but not used [-Werror,-Wunused-but-set-variable]
  117 |     if (VectorType *SrcTy = dyn_cast<VectorType>(V->getType())) {
      |                     ^
1 error generated.
[337/2421] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/Core.cpp.o
FAILED: lib/IR/CMakeFiles/LLVMCore.dir/Core.cpp.o
/usr/lib/llvm-19/bin/clang++ -DGTEST_HAS_RTTI=0 -D_ERAVM -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/era-compiler-solidity/target-llvm/build-final/lib/IR -I/era-compiler-solidity/llvm/llvm/lib/IR -I/era-compiler-solidity/target-llvm/build-final/include -I/era-compiler-solidity/llvm/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -std=c++17 -MD -MT lib/IR/CMakeFiles/LLVMCore.dir/Core.cpp.o -MF lib/IR/CMakeFiles/LLVMCore.dir/Core.cpp.o.d -o lib/IR/CMakeFiles/LLVMCore.dir/Core.cpp.o -c /era-compiler-solidity/llvm/llvm/lib/IR/Core.cpp
/era-compiler-solidity/llvm/llvm/lib/IR/Core.cpp:99:22: error: cast from 'LLVMDiagnosticHandler' (aka 'void (*)(LLVMOpaqueDiagnosticInfo *, void *)') to 'DiagnosticHandler::DiagnosticHandlerTy' (aka 'void (*)(const DiagnosticInfo &, void *)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
   99 |       LLVM_EXTENSION reinterpret_cast<DiagnosticHandler::DiagnosticHandlerTy>(
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  100 |           Handler),
      |           ~~~~~~~~
/era-compiler-solidity/llvm/llvm/lib/IR/Core.cpp:105:25: error: cast from 'DiagnosticHandler::DiagnosticHandlerTy' (aka 'void (*)(const DiagnosticInfo &, void *)') to 'LLVMDiagnosticHandler' (aka 'void (*)(LLVMOpaqueDiagnosticInfo *, void *)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  105 |   return LLVM_EXTENSION reinterpret_cast<LLVMDiagnosticHandler>(
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  106 |       unwrap(C)->getDiagnosticHandlerCallBack());
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
[344/2421] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/DebugInfoMetadata.cpp.o