Simplified LR filter

Makefile

src/core/ext/load_reporting/load_reporting.c

src/core/ext/load_reporting/load_reporting.h

src/core/ext/load_reporting/load_reporting_filter.c

src/core/ext/load_reporting/load_reporting_filter.h

test/core/end2end/fixtures/h2_load_reporting.c

test/core/end2end/gen_build_yaml.py

test/core/end2end/tests/load_reporting_hook.c

tools/run_tests/sources_and_headers.json

tools/run_tests/tests.json

vsprojects/buildtests_c.sln

...reporting_nosec_test/h2_load_reporting_nosec_test.vcxproj

...g_nosec_test/h2_load_reporting_nosec_test.vcxproj.filters

...res/h2_load_reporting_test/h2_load_reporting_test.vcxproj

...oad_reporting_test/h2_load_reporting_test.vcxproj.filters