scripted-diff: LogPrintLevel(*,BCLog::Level::*,*) -> LogError()/LogWarning()

This is a minimal behavior change and changes log output from:

  [net:error] Something bad happened
  [net:warning] Something problematic happened

to either

  [error] Something bad happened
  [warning] Something problematic happened

or, when -loglevelalways=1 is enabled:

  [all:error] Something bad happened
  [all:warning] Something problematic happened

Such a behavior change is desired, because all warning and error logs
are written in the same style in the source code and they are logged in
the same format for log consumers.

-BEGIN VERIFY SCRIPT-

 sed --regexp-extended --in-place \
   's/LogPrintLevel\((BCLog::[^,]*), BCLog::Level::(Error|Warning), */Log\2(/g' \
   $( git grep -l LogPrintLevel ':(exclude)src/test/logging_tests.cpp' )

-END VERIFY SCRIPT-

src/node/blockstorage.cpp

@@ -863,7 +863,7 @@ FlatFilePos BlockManager::FindNextBlockPos(unsigned int nAddSize, unsigned int n
         // a reindex. A flush error might also leave some of the data files
         // untrimmed.
         if (!FlushBlockFile(last_blockfile, /*fFinalize=*/true, finalize_undo)) {
-            LogPrintLevel(BCLog::BLOCKSTORAGE, BCLog::Level::Warning,
+            LogWarning(
                           "Failed to flush previous block file %05i (finalize=1, finalize_undo=%i) before opening new block file %05i\n",
                           last_blockfile, finalize_undo, nFile);
         }
@@ -987,7 +987,7 @@ bool BlockManager::WriteBlockUndo(const CBlockUndo& blockundo, BlockValidationSt
             // fact it is. Note though, that a failed flush might leave the data
             // file untrimmed.
             if (!FlushUndoFile(pos.nFile, true)) {
-                LogPrintLevel(BCLog::BLOCKSTORAGE, BCLog::Level::Warning, "Failed to flush undo file %05i\n", pos.nFile);
+                LogWarning("Failed to flush undo file %05i\n", pos.nFile);
             }
         } else if (pos.nFile == cursor.file_num && block.nHeight > cursor.undo_height) {
             cursor.undo_height = block.nHeight;