Add uses clauses to filegroups to ease dependency management

BUILD

Makefile

binding.gyp

build.yaml

config.m4

gRPC.podspec

grpc.gemspec

package.json

package.xml

src/python/grpcio/grpc_core_dependencies.py

tools/buildgen/plugins/expand_filegroups.py

tools/doxygen/Doxyfile.c++

tools/doxygen/Doxyfile.c++.internal

tools/doxygen/Doxyfile.core

tools/doxygen/Doxyfile.core.internal

tools/run_tests/sources_and_headers.json

vsprojects/vcxproj/gpr/gpr.vcxproj

vsprojects/vcxproj/gpr/gpr.vcxproj.filters

vsprojects/vcxproj/grpc++/grpc++.vcxproj

vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters