Refactor testing setup

.lcovrc

lib/rdcu_compress/cmp_rdcu.c

lib/rdcu_compress/cmp_rdcu_testing.h

meson.build

programs/meson.build

programs/rdcu_pkt_to_file.c

subprojects/packagefiles/pcg-c-basic-Port-to-C89.patch

subprojects/packagefiles/pcg-c-basic/meson.build

subprojects/pcg-c-basic.wrap

subprojects/unity.wrap

test/cmp_data_types/meson.build

test/cmp_decmp/meson.build

test/cmp_entity/meson.build

test/cmp_icu/meson.build

test/cmp_max_used_bits/meson.build

test/cmp_rdcu_cfg/meson.build

test/decmp/meson.build

test/meson.build

test/test_common/test_common.c

test/tools/generate_test_runner.rb