[data.montgomery] Decompress JSON files for ease of use

src/ptbench/data/montgomery/default.json

src/ptbench/data/montgomery/default.json.bz2

src/ptbench/data/montgomery/fold_0.json

src/ptbench/data/montgomery/fold_0.json.bz2

src/ptbench/data/montgomery/fold_1.json

src/ptbench/data/montgomery/fold_1.json.bz2

src/ptbench/data/montgomery/fold_2.json

src/ptbench/data/montgomery/fold_2.json.bz2

src/ptbench/data/montgomery/fold_3.json

src/ptbench/data/montgomery/fold_3.json.bz2

src/ptbench/data/montgomery/fold_4.json

src/ptbench/data/montgomery/fold_4.json.bz2

src/ptbench/data/montgomery/fold_5.json

src/ptbench/data/montgomery/fold_5.json.bz2

src/ptbench/data/montgomery/fold_6.json

src/ptbench/data/montgomery/fold_6.json.bz2

src/ptbench/data/montgomery/fold_7.json

src/ptbench/data/montgomery/fold_7.json.bz2

src/ptbench/data/montgomery/fold_8.json

src/ptbench/data/montgomery/fold_8.json.bz2