Clang: Add tooltip action to remove specific warnings/checks

...from the diagnostic configuration.

If no custom diagnostic configuration is set in Projects Mode > Clang,
one is created and set for the current project. Otherwise the current
custom diagnostic set in the project settings is modified.

Change-Id: I5c48280c90f0e807e7333122d504dda302a8b0a9
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/plugins/cpptools/cpptoolsreuse.cpp

@@ -27,6 +27,7 @@
 
 #include "cppcodemodelsettings.h"
 #include "cpptoolsplugin.h"
+#include "cpptools_clazychecks.h"
 
 #include <coreplugin/documentmanager.h>
 #include <coreplugin/editormanager/editormanager.h>
@@ -287,4 +288,14 @@ UsePrecompiledHeaders getPchUsage()
     return UsePrecompiledHeaders::Yes;
 }
 
+QString clazyChecksForLevel(int level)
+{
+    QStringList checks;
+    for (const Constants::ClazyCheckInfo &check : Constants::CLAZY_CHECKS) {
+        if (check.level == level)
+            checks << check.name;
+    }
+    return checks.join(',');
+}
+
 } // CppTools