Remove CMake warning: jobserver unavailable: using -j1. Add `+' to parent make rule. (#7334)

## Summary of changes

This PR removes the CMake warning: jobserver unavailable: using -j1. Add
`+' to parent make rule.

## Reason for change

The warning is annoying

## Implementation details

For recent versions of CMAKE I've added:

```
set_property(TARGET re2 PROPERTY JOB_SERVER_AWARE TRUE)
```

for older versions I've changed the `OSXRE2BUILDCOMMAND` to overwrite
the `MAKEFLAGS` environment variable.

## Test coverage

If the warning is removed then it worked.

## Other details
<!-- Fixes #{issue} -->


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Author: tonyredondo

build/cmake/FindRe2.cmake

@@ -8,11 +8,11 @@ if (ISMACOS)
     SET (OSXRE2BUILDCOMMAND
             echo "Building Re2 Arm64" &&
             rm -f -r ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/obj &&
-            ${CMAKE_COMMAND} -E env LDFLAGS=-arch\ arm64 ARFLAGS=-r\ -s\ -c CXXFLAGS=-O3\ -g\ -fPIC\ -target\ arm64-apple-darwin${CMAKE_HOST_SYSTEM_VERSION}\ -Wno-unused-but-set-variable\ -D_GLIBCXX_USE_CXX11_ABI=0 $(MAKE) -j &&
+            ${CMAKE_COMMAND} -E env MAKEFLAGS=-s LDFLAGS=-arch\ arm64 ARFLAGS=-r\ -s\ -c CXXFLAGS=-O3\ -g\ -fPIC\ -target\ arm64-apple-darwin${CMAKE_HOST_SYSTEM_VERSION}\ -Wno-unused-but-set-variable\ -D_GLIBCXX_USE_CXX11_ABI=0 $(MAKE) -j &&
             mv ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/obj/libre2.a ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/libre2.arm64.a &&
             echo "Building Re2 X86_64" &&
             rm -f -r ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/obj &&
-            ${CMAKE_COMMAND} -E env LDFLAGS=-arch\ x86_64 ARFLAGS=-r\ -s\ -c CXXFLAGS=-O3\ -g\ -fPIC\ -target\ x86_64-apple-darwin${CMAKE_HOST_SYSTEM_VERSION}\ -Wno-unused-but-set-variable\ -D_GLIBCXX_USE_CXX11_ABI=0 $(MAKE) -j &&
+            ${CMAKE_COMMAND} -E env MAKEFLAGS=-s LDFLAGS=-arch\ x86_64 ARFLAGS=-r\ -s\ -c CXXFLAGS=-O3\ -g\ -fPIC\ -target\ x86_64-apple-darwin${CMAKE_HOST_SYSTEM_VERSION}\ -Wno-unused-but-set-variable\ -D_GLIBCXX_USE_CXX11_ABI=0 $(MAKE) -j &&
             mv ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/obj/libre2.a ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/libre2.x86_64.a &&
             echo "Creating Re2 universal binary" &&
             lipo ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/libre2.arm64.a ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/libre2.x86_64.a -create -output ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/obj/libre2.a
@@ -27,6 +27,9 @@ if (ISMACOS)
         BUILD_COMMAND ${OSXRE2BUILDCOMMAND}
         BUILD_BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/re2-prefix/src/re2/obj/libre2.a
     )
+
+    set_property(TARGET re2 PROPERTY JOB_SERVER_AWARE TRUE)
+
 elseif(ISLINUX)
     ExternalProject_Add(re2
         DOWNLOAD_COMMAND ${DOWNLOAD_COMMAND}