Add an explicit toggle for the static analyzer in clang-tidy

Instead of using CLANG_ENABLE_STATIC_ANALYZER for use of the
static analyzer in both clang and clang-tidy, add a second
toggle CLANG_TIDY_ENABLE_STATIC_ANALYZER.

This allows enabling the static analyzer in clang-tidy while
disabling it in clang.

Differential Revison: https://reviews.llvm.org/D87118
diff --git a/clang-tools-extra/test/lit.cfg.py b/clang-tools-extra/test/lit.cfg.py
index 2366f46..24cabd8 100644
--- a/clang-tools-extra/test/lit.cfg.py
+++ b/clang-tools-extra/test/lit.cfg.py
@@ -115,7 +115,7 @@
 if platform.system() not in ['Windows']:
     config.available_features.add('ansi-escape-sequences')
 
-if config.clang_staticanalyzer:
+if config.clang_tidy_staticanalyzer:
     config.available_features.add('static-analyzer')
 
 # Get shlex.quote if available (added in 3.3), and fall back to pipes.quote if