[clang-tidy] Remove reference to CSA AnalysisStoreOpt field

D126215 removed the `AnalysisStoreOpt` field, so `clang-tidy` should not
refer to it.
http://45.33.8.238/linux/78232/step_4.txt

  ../../clang-tools-extra/clang-tidy/ClangTidy.cpp:444:22: error: no
member named 'AnalysisStoreOpt' in 'clang::AnalyzerOptions'
      AnalyzerOptions->AnalysisStoreOpt = RegionStoreModel;
      ~~~~~~~~~~~~~~~~~^
  ../../clang-tools-extra/clang-tidy/ClangTidy.cpp:444:41: error: use of
undeclared identifier 'RegionStoreModel'
      AnalyzerOptions->AnalysisStoreOpt = RegionStoreModel;

This one liner patch should resolve the build failure.

Differential Revision: https://reviews.llvm.org/D126215