do not hard-code job number for MinGW/Cygwin builds in CI (#7239)

Author: firewave

.github/workflows/CI-cygwin.yml

@@ -49,7 +49,7 @@ jobs:
       # Cygwin will always link the binaries even if they already exist. The linking is also extremely slow. So just run the "check" target which includes all the binaries.
       - name: Build all and run test
         run: |
-          C:\cygwin\bin\bash.exe -l -c cd %GITHUB_WORKSPACE% && make VERBOSE=1 -j2 check
+          C:\cygwin\bin\bash.exe -l -c cd %GITHUB_WORKSPACE% && make VERBOSE=1 -j%NUMBER_OF_PROCESSORS% check
 
       - name: Extra test for misra
         run: |

.github/workflows/CI-mingw.yml

@@ -54,22 +54,22 @@ jobs:
         run: |
           export PATH="/mingw64/lib/ccache/bin:$PATH"
           # set RDYNAMIC to work around broken MinGW detection
-          make VERBOSE=1 RDYNAMIC=-lshlwapi -j2 cppcheck
+          make VERBOSE=1 RDYNAMIC=-lshlwapi -j$(nproc) cppcheck
         env:
           LDFLAGS: -fuse-ld=lld # use lld for faster linking
 
       - name: Build test
         run: |
           export PATH="/mingw64/lib/ccache/bin:$PATH"
           # set RDYNAMIC to work around broken MinGW detection
-          make VERBOSE=1 RDYNAMIC=-lshlwapi -j2 testrunner
+          make VERBOSE=1 RDYNAMIC=-lshlwapi -j$(nproc) testrunner
         env:
           LDFLAGS: -fuse-ld=lld # use lld for faster linking
 
       - name: Run test
         run: |
           export PATH="/mingw64/lib/ccache/bin:$PATH"
           # set RDYNAMIC to work around broken MinGW detection
-          make VERBOSE=1 RDYNAMIC=-lshlwapi -j2 check
+          make VERBOSE=1 RDYNAMIC=-lshlwapi -j$(nproc) check
         env:
           LDFLAGS: -fuse-ld=lld # use lld for faster linking

.github/workflows/scriptcheck.yml

@@ -218,7 +218,7 @@ jobs:
 
       - name: run dmake
         run: |
-          make -j2 CXXFLAGS="-w" run-dmake
+          make -j3 CXXFLAGS="-w" run-dmake
 
       - name: check diff
         run: |