ClangTools: Query the tools for supported checks

...instead of hardcoding them for a particular version of
clang-tidy/clazy.

While at it, move also the tidy/clazy widgets to ClangTools as this
simplifies feeding data to them.

Reduce also the built-in configs to a single one using clang-tidy's and
clazy's default checks as they look very reasonable and saves us some
porting effort. Also, our previous built-in configs were just too
numerous.

Change-Id: Ib9297acb7810a940b86a23a8695530506a570394
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/cpptools/cpptools.qbs

@@ -53,7 +53,6 @@ Project {
             "clangdiagnosticconfigswidget.cpp",
             "clangdiagnosticconfigswidget.h",
             "clangdiagnosticconfigswidget.ui",
-            "clazychecks.ui",
             "compileroptionsbuilder.cpp",
             "compileroptionsbuilder.h",
             "cppbuiltinmodelmanagersupport.cpp",
@@ -154,8 +153,6 @@ Project {
             "cppsemanticinfoupdater.h",
             "cppsourceprocessor.cpp",
             "cppsourceprocessor.h",
-            "cpptools_clangtidychecks.h",
-            "cpptools_clazychecks.h",
             "cpptools_global.h",
             "cpptools_utils.h",
             "cpptoolsbridge.cpp",
@@ -214,7 +211,6 @@ Project {
             "symbolfinder.h",
             "symbolsfindfilter.cpp",
             "symbolsfindfilter.h",
-            "tidychecks.ui",
             "typehierarchybuilder.cpp",
             "typehierarchybuilder.h",
             "usages.h",