Streamline dump control options

- Rename `--dump-treei` option to `--dumpi-tree`, which itself is now a
  special case of `--dumpi-<tag>` where tag can be a magic word, or a
  filename
- Control dumping via static `dump*()` functions, analogous to `debug()`
- Make dumping independent of the value of `debug()` (so dumping always
  works even without the debug flag)
- Add separate `--dumpi-graph` for dumping V3Graphs, which is again a
  special case of `--dumpi-<tag>`
- Alias `--dump-<tag>` to `--dumpi-<tag> 3` as before

src/V3File.cpp

@@ -56,6 +56,8 @@
 #endif
 // clang-format on
 
+VL_DEFINE_DEBUG_FUNCTIONS;
+
 // If change this code, run a test with the below size set very small
 // #define INFILTER_IPC_BUFSIZ 16
 constexpr int INFILTER_IPC_BUFSIZ = (64 * 1024);  // For debug, try this as a small number
@@ -346,7 +348,6 @@ class VInFilterImp final {
 
 private:
     // METHODS
-    VL_DEBUG_FUNC;  // Declare debug()
 
     bool readContents(const string& filename, StrList& outl) {
         if (m_pid) {