[DPU] Fix unit tests compilation after merge from master branch.

[oleksandrivantsiv]

What I did
Fix unit tests compilation issue after merge from the master branch:

/bin/bash ../../libtool  --tag=CXX   --mode=link g++ -Wl,-wrap,if_nameindex -Wl,-wrap,if_freenameindex -g -O2 -ffile-prefix-map=/sonic/src/sonic-swss=. -fstack-protector-strong -Wformat -Werror=format-security  -Wl,-z,relro -o tests_portsyncd tests_portsyncd-portsyncd_ut.o tests_portsyncd-linksync.o tests_portsyncd-mock_dbconnector.o tests_portsyncd-mock_shell_command.o tests_portsyncd-mock_table.o tests_portsyncd-mock_hiredis.o tests_portsyncd-mock_redisreply.o -L/usr/src/gtest -lnl-genl-3 -lhiredis -lhiredis -lswsscommon -lswsscommon -lgtest -lgtest_main -lnl-3 -lnl-route-3 -lpthread -lnl-nf-3 -lnl-route-3 -lnl-genl-3 -lnl-3 -lhiredis
libtool: link: g++ -Wl,-wrap -Wl,if_nameindex -Wl,-wrap -Wl,if_freenameindex -g -O2 -ffile-prefix-map=/sonic/src/sonic-swss=. -fstack-protector-strong -Wformat -Werror=format-security -Wl,-z -Wl,relro -o tests_portsyncd tests_portsyncd-portsyncd_ut.o tests_portsyncd-linksync.o tests_portsyncd-mock_dbconnector.o tests_portsyncd-mock_shell_command.o tests_portsyncd-mock_table.o tests_portsyncd-mock_hiredis.o tests_portsyncd-mock_redisreply.o  -L/usr/src/gtest -lswsscommon -lgtest -lgtest_main -lpthread -lnl-nf-3 -lnl-route-3 -lnl-genl-3 -lnl-3 -lhiredis
/usr/bin/ld: tests_portsyncd-linksync.o: in function `bool std::operator==<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*)':
/usr/include/c++/10/bits/basic_string.h:6187: undefined reference to `g_switchType[abi:cxx11]'
/usr/bin/ld: /usr/include/c++/10/bits/basic_string.h:6187: undefined reference to `g_switchType[abi:cxx11]'
collect2: error: ld returned 1 exit status

Why I did it
To fix compilation of SWSS deb package.

How I verified it
Compile SWSS deb package.

Details if related