util: Move error message formatting of NonFatalCheckError to cpp

This allows to strip down the header file

src/util/check.cpp

@@ -4,8 +4,23 @@
 
 #include <util/check.h>
 
+#if defined(HAVE_CONFIG_H)
+#include <config/bitcoin-config.h>
+#endif
+
 #include <tinyformat.h>
 
+#include <cstdio>
+#include <cstdlib>
+#include <string>
+
+
+NonFatalCheckError::NonFatalCheckError(const char* msg, const char* file, int line, const char* func)
+    : std::runtime_error{
+          strprintf("Internal bug detected: \"%s\"\n%s:%d (%s)\nPlease report this issue here: %s\n", msg, file, line, func, PACKAGE_BUGREPORT)}
+{
+}
+
 void assertion_fail(const char* file, int line, const char* func, const char* assertion)
 {
     auto str = strprintf("%s:%s %s: Assertion `%s' failed.\n", file, line, func, assertion);