src: apply clang-tidy rule modernize-use-emplace

[gengjiawen]

See https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-emplace.html

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[BridgeAR]

CI https://ci.nodejs.org/job/node-test-pull-request/21395/

[danbev]

CI: https://ci.nodejs.org/job/node-test-pull-request/21531/

[gengjiawen]

@danbev Can you import this and #26585, thanks.

[danbev]

Landed in f091d4e.

[targos]

Compilation fails if this is applied on v11.x-staging:

make -C out BUILDTYPE=Release V=
  TOUCH cbca18b98112d8bc68a52ca94d8199523305cf11.intermediate
  ACTION _home_mzasso_git_nodejs_v11_x_deps_v8_gypfiles_v8_gyp_v8_torque_host_run_torque cbca18b98112d8bc68a52ca94d8199523305cf11.intermediate
  TOUCH b4eb7431cd5126f82ef689c4118ba80414d6aa1b.intermediate
  ACTION Generating inspector protocol sources from protocol json b4eb7431cd5126f82ef689c4118ba80414d6aa1b.intermediate
  TOUCH 3c3044250b6b8174e7fa6ce999544ccc88deb4fe.intermediate
  ACTION Generating node protocol sources from protocol json 3c3044250b6b8174e7fa6ce999544ccc88deb4fe.intermediate
  CXX(target) /home/mzasso/git/nodejs/v11.x/out/Release/obj.target/node_lib/src/inspector_socket.o
../src/inspector_socket.cc: In static member function ‘static int node::inspector::{anonymous}::HttpHandler::OnMessageComplete(parser_t*)’:
../src/inspector_socket.cc:570:43: error: cannot bind bitfield ‘parser->http_parser::upgrade’ to ‘unsigned int&’
                                   parser->upgrade,
                                   ~~~~~~~~^~~~~~~
make[1]: *** [node_lib.target.mk:340: /home/mzasso/git/nodejs/v11.x/out/Release/obj.target/node_lib/src/inspector_socket.o] Error 1

Please open a backport PR or apply the dont-land-on label.