[mlir][Tablegen-LSP] Don't link with llvm dylib

This updates 5de12bb
to not link with the dylib since that does not include
the tablegen library.

Should fix flang dylib build failures:
https://lab.llvm.org/buildbot/#/builders/177/builds/5120

Author: DavidSpickett

mlir/lib/Tools/tblgen-lsp-server/CMakeLists.txt

@@ -12,6 +12,8 @@ llvm_add_library(TableGenLspServerLib
   ADDITIONAL_HEADER_DIRS
   ${MLIR_MAIN_INCLUDE_DIR}/mlir/Tools/tblgen-lsp-server
 
+  DISABLE_LLVM_LINK_LLVM_DYLIB
+
   LINK_LIBS PUBLIC
   MLIRLspServerSupportLib
   MLIRSupport