Merge pull request #10670 from apolcyn/fix_ruby_require_before_fork

src/ruby/end2end/forking_client_client.rb

src/ruby/end2end/forking_client_driver.rb

src/ruby/end2end/grpc_class_init_client.rb

src/ruby/end2end/grpc_class_init_driver.rb

src/ruby/ext/grpc/rb_call_credentials.c

src/ruby/ext/grpc/rb_channel.c

src/ruby/ext/grpc/rb_channel.h

src/ruby/ext/grpc/rb_channel_credentials.c

src/ruby/ext/grpc/rb_compression_options.c

src/ruby/ext/grpc/rb_grpc.c

src/ruby/ext/grpc/rb_grpc.h

src/ruby/ext/grpc/rb_server.c

tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh