build: clear 11 single-site clang-cl warning categories (#15584)

build: clear eleven single-site clang-cl warning categories

Each of these is the last site left in its category, and every one is the
compiler saying it cannot tell what the code meant. Nothing here changes
defined behavior.

- OrcaSlicer_app_msvc.cpp printed a DWORD with %d
- StackWalker.cpp ran delete[] through an LPVOID
- ToolOrdering.cpp used a bare ; as a deliberate skip loop's body
- WipeTower.cpp had finish_block_tcr = finish_block_tcr, so the branch that
  reached it did nothing. Folding the condition into the enclosing if leaves
  the other branch untouched
- GCodeProcessor.cpp had an else binding to the inner if while the outer if
  carried no braces
- AmsMappingPopupUpdate.cpp wrote >= 1 || <= 3 where its own comment says &&
- CalibrationWizardPresetPage.cpp left max_decimal_length unset through a
  pair of conditions that cover every value but not visibly so
- DevManager.cpp bound map elements to pair<K, V> rather than
  pair<const K, V>, copying every one
- SyncAmsInfoDialog.cpp had extraneous parentheses around a comparison
- Http.cpp had if (speed > 0.01) speed = speed;. speed now starts at 0 as
  well, because curl_easy_getinfo leaves the target untouched when it fails
  and the value reaches Progress either way
- SnapmakerPrinterAgent.cpp truncated npos into an unsigned int, so the
  != npos guard was always true. A colour with no # still yields 0, because
  the wrap produced 0 as well

Nine categories go to zero. -Wtautological-overlap-compare and
-Wsometimes-uninitialized reach zero when #15583 merges their second site.

src/OrcaSlicer_app_msvc.cpp

@@ -297,7 +297,7 @@ int wmain(int argc, wchar_t **argv)
 //	printf("Loading Slic3r library: %S\n", path_to_slic3r);
     HINSTANCE hInstance_Slic3r = LoadLibraryExW(path_to_slic3r, nullptr, 0);
     if (hInstance_Slic3r == nullptr) {
-        printf("OrcaSlicer.dll was not loaded, error=%d\n", GetLastError());
+        printf("OrcaSlicer.dll was not loaded, error=%lu\n", GetLastError());
         return -1;
     }