g++ in CI don't report deprecated error

[Shylock-Hg]

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Describe the bug (required)

As shown in #3641
g++ already support it from 4.9 as said in https://gcc.gnu.org/projects/cxx-status.html#cxx14

Your Environments (required)

• OS: uname -a
• Compiler: g++ --version or clang++ --version
• CPU: lscpu
• Commit id (e.g. a3ffc7d8)

How To Reproduce(required)

Steps to reproduce the behavior:

1. Step 1
2. Step 2
3. Step 3

Expected behavior

Additional context

[Shylock-Hg]

Maybe caused by mistake marked Wno-deprecated-declarations option.

[yixinglu]

I test the following compile command for g++ 9.2.0 and don't get any errors:

/opt/vesoft/toolset/clang/10.0.0/bin/g++ -DNEBULA_HOME=/home/yee.yi/Workspace/vesoft/nebula -DS2_USE_GFLAGS -DS2_USE_GLOG -D__STDC_FORMAT_MACROS -I/home/yee.yi/Workspace/vesoft/nebula/src -I/home/yee.yi/Workspace/vesoft/nebula/cmake-build-gcc/src -isystem /opt/vesoft/third-party/
3.0/include -isystem /opt/vesoft/third-party/3.0/include/breakpad -g -Wall -Wextra -Wpedantic -Wunused-parameter -Wshadow -Wnon-virtual-dtor -Woverloaded-virtual -Wignored-qualifiers -Werror -Wno-attributes -fno-strict-aliasing -fomit-frame-pointer -ffunction-sections -fdata-sections
 -std=c++17 -o CMakeFiles/meta_version_man_obj.dir/MetaVersionMan.cpp.o -c /home/yee.yi/Workspace/vesoft/nebula/src/meta/MetaVersionMan.cpp

I am also confused about the compiler behavior, I don't specify the Wno-deprecated-declarations when compiling the source file.

However, when switching to clang, we can see the expected error message:

/opt/vesoft/toolset/clang/10.0.0/bin/clang++ -DNEBULA_HOME=/home/yee.yi/Workspace/vesoft/nebula -DS2_USE_GFLAGS -DS2_USE_GLOG -D__STDC_FORMAT_MACROS -I/home/yee.yi/Workspace/vesoft/nebula/src -I/home/yee.yi/Workspace/vesoft/nebula/cmake-build-gcc/src -isystem /opt/vesoft/third-pa
rty/3.0/include -isystem /opt/vesoft/third-party/3.0/include/breakpad -g -Wall -Wextra -Wpedantic -Wunused-parameter -Wshadow -Wnon-virtual-dtor -Woverloaded-virtual -Wignored-qualifiers -Werror -Wno-attributes -fno-strict-aliasing -fomit-frame-pointer -ffunction-sections -fdata-sect
ions -std=c++17 -o CMakeFiles/meta_version_man_obj.dir/MetaVersionMan.cpp.o.2 -c /home/yee.yi/Workspace/vesoft/nebula/src/meta/MetaVersionMan.cpp
/home/yee.yi/Workspace/vesoft/nebula/src/meta/MetaVersionMan.cpp:64:26: error: 'format<std::__cxx11::basic_string<char> >' is deprecated: Use fmt::format instead of folly::format for better performance, build times and compatibility with std::format [-Werror,-Wdeprecated-declarations
]
  auto snapshot = folly::format("META_UPGRADE_SNAPSHOT_{}", MetaKeyUtils::genTimestampStr()).str();
                         ^
/opt/vesoft/third-party/3.0/include/folly/Format.h:258:3: note: 'format<std::__cxx11::basic_string<char> >' has been explicitly marked deprecated here
[[deprecated(
  ^
1 error generated.

these compiler parameters is same. This is really weird！