modernize coverity scan a bit

.github/workflows/coverity.yml

@@ -3,26 +3,37 @@ name: Coverity
 on:
   schedule:
   - cron: "0 0 * * *"
+  workflow_dispatch:
 
 jobs:
   scan:
-    runs-on: ubuntu-20.04
-    if: ${{ github.repository_owner == 'gost-engine' }}
+    runs-on: ubuntu-latest
+    if: ${{ github.repository_owner == 'gost-engine' || github.event_name == 'workflow_dispatch' }}
     env:
-      COVERITY_SCAN_PROJECT_NAME: 'gost-engine'
-      COVERITY_SCAN_BRANCH_PATTERN: '*'
-      COVERITY_SCAN_NOTIFICATION_EMAIL: 'chipitsine@gmail.com'
-      COVERITY_SCAN_BUILD_COMMAND_PREPEND: ".github/before_script.sh"
-      COVERITY_SCAN_BUILD_COMMAND: ".github/script.sh"
       OPENSSL_BRANCH: openssl-3.0
       USE_RPATH: yes
 
     steps:
     - uses: actions/checkout@v2
       with:
            submodules: true
-    - name: Run Coverity Scan
-      env:
-        COVERITY_SCAN_TOKEN: ${{ secrets.COVERITY_SCAN_TOKEN }}
+
+    - name: Download Coverity build tool
+      run: |
+        wget -c -N https://scan.coverity.com/download/linux64 --post-data "token=${{ secrets.COVERITY_SCAN_TOKEN }}&project=gost-engine" -O coverity_tool.tar.gz
+        mkdir coverity_tool
+        tar xzf coverity_tool.tar.gz --strip 1 -C coverity_tool
+    - name: Build with Coverity build tool
+      run: |
+        export PATH=`pwd`/coverity_tool/bin:$PATH
+        .github/before_script.sh
+        cov-build --dir cov-int .github/script.sh
+    - name: Submit build result to Coverity Scan
       run: |
-        curl -fsSL "https://scan.coverity.com/scripts/travisci_build_coverity_scan.sh" | bash || true
+        tar czvf cov.tar.gz cov-int
+        curl --form token=${{ secrets.COVERITY_SCAN_TOKEN }} \
+          --form email=chipitsine@gmail.com \
+          --form file=@cov.tar.gz \
+          --form version="Commit $GITHUB_SHA" \
+          --form description="Build submitted via CI" \
+          https://scan.coverity.com/builds?project=gost-engine