Enable all gcc and clang warnings for testing the CI (#478)

* Enable all gcc and clang warnings for testing the CI

* Enable all gcc and clang warnings through GitHub workflow instead of CMake

.github/workflows/linux.yaml

diff --git a/.github/workflows/linux.yaml b/.github/workflows/linux.yaml
index 03c7405..673f0ef 100644
--- a/.github/workflows/linux.yaml
+++ b/.github/workflows/linux.yaml
@@ -57,6 +57,28 @@
       run: |
         cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
           -DVMA_BUILD_SAMPLES=YES \
+          -DCMAKE_CXX_FLAGS="-Wall
+                              -Wextra
+                              -Wpedantic
+                              -Wconversion
+                              -Wsign-conversion
+                              -Wshadow
+                              -Wnull-dereference
+                              -Wdouble-promotion
+                              -Wformat=2
+                              -Wimplicit-fallthrough
+                              -Wundef
+                              -Wcast-align
+                              -Woverloaded-virtual
+                              -Wnon-virtual-dtor
+                              -Wstrict-overflow=5
+                              -Wuseless-cast
+                              -Wduplicated-cond
+                              -Wduplicated-branches
+                              -Wlogical-op
+                              -Wredundant-decls
+                              -Wstrict-null-sentinel
+                              -Wold-style-cast"
           $GITHUB_WORKSPACE
 
     - name: Build