CI: turn on assertion checks

This turn on assertions from qbt codebase so that testers can verify the assertions really hold.

PR #21499.

.github/workflows/ci_macos.yaml

@@ -99,7 +99,7 @@ jobs:
 
       - name: Build qBittorrent
         run: |
-          CXXFLAGS="$CXXFLAGS -Werror -Wno-error=deprecated-declarations" \
+          CXXFLAGS="$CXXFLAGS -DQT_FORCE_ASSERTS -Werror -Wno-error=deprecated-declarations" \
           LDFLAGS="$LDFLAGS -gz" \
           cmake \
             -B build \

.github/workflows/ci_ubuntu.yaml

@@ -101,7 +101,7 @@ jobs:
 
       - name: Build qBittorrent
         run: |
-          CXXFLAGS="$CXXFLAGS ${{ env.harden_flags }} -Werror" \
+          CXXFLAGS="$CXXFLAGS ${{ env.harden_flags }} -DQT_FORCE_ASSERTS -Werror" \
           LDFLAGS="$LDFLAGS -gz" \
           cmake \
             -B build \

.github/workflows/ci_windows.yaml

@@ -127,7 +127,7 @@ jobs:
 
       - name: Build qBittorrent
         run: |
-          $env:CXXFLAGS+=" /WX"
+          $env:CXXFLAGS+="/DQT_FORCE_ASSERTS /WX"
           cmake `
             -B build `
             -G "Ninja" `