Extend loplugin:redundantinline to catch inline functions w/o external linkage

...where "inline" (in its meaning of "this function can be defined in multiple
translation units") thus doesn't make much sense.  (As discussed in
compilerplugins/clang/redundantinline.cxx, exempt such "static inline" functions
in include files for now.)

All the rewriting has been done automatically by the plugin, except for one
instance in sw/source/ui/frmdlg/column.cxx that used to involve an #if), plus
some subsequent solenv/clang-format/reformat-formatted-files.

Change-Id: Ib8b996b651aeafc03bbdc8890faa05ed50517224
Reviewed-on: https://gerrit.libreoffice.org/61573
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

connectivity/source/drivers/postgresql/pq_databasemetadata.cxx

@@ -1338,7 +1338,7 @@ sal_Int32 typeNameToDataType( const OUString &typeName, const OUString &typtype
 }
 
 namespace {
-    inline bool isSystemColumn( sal_Int16 attnum )
+    bool isSystemColumn( sal_Int16 attnum )
     {
         return attnum <= 0;
     }