Suppress clang-tidy error on main functions

The main functions now catch all exceptions, but there is still the
possibility that the logging of the error message throws again. Not much
we can do about this.

Author: joto

src/gen/osm2pgsql-gen.cpp

@@ -595,6 +595,7 @@ void genproc_t::run()
     }
 }
 
+// NOLINTNEXTLINE(bugprone-exception-escape)
 int main(int argc, char *argv[])
 {
     try {

src/osm2pgsql.cpp

@@ -348,6 +348,7 @@ static void check_and_set_style(options_t *options)
     }
 }
 
+// NOLINTNEXTLINE(bugprone-exception-escape)
 int main(int argc, char *argv[])
 {
     try {
@@ -404,6 +405,9 @@ int main(int argc, char *argv[])
     } catch (std::exception const &e) {
         log_error("{}", e.what());
         return 1;
+    } catch (...) {
+        log_error("Unknown exception.");
+        return 1;
     }
 
     return 0;