[tests] blocks-tests-tools: provision of the first chunks of the g1-test

lib/tests-tools/blocks-tests-tools/Cargo.toml

lib/tests-tools/blocks-tests-tools/rsc/chunk_0-250.json

lib/tests-tools/blocks-tests-tools/rsc/chunk_1-250.json

lib/tests-tools/blocks-tests-tools/rsc/chunk_2-250.json

lib/tests-tools/blocks-tests-tools/src/gt.rs

lib/tests-tools/blocks-tests-tools/src/json_chunk_parser.rs

lib/tests-tools/blocks-tests-tools/src/lib.rs