feature: Add flag to dump debug t8n information

[marioevz]

Adds flag --transition-tool-debug-dump-path which can be used to specify a path where debugging information for all transition tool invocations will be dumped.

For example:

fill ./tests/frontier/opcodes/test_dup.py  --transition-tool-debug-dump-path=./tmp/

Will result in the following folders:

test_dup_fork_Berlin             test_dup_fork_Frontier   test_dup_fork_Merge
test_dup_fork_Byzantium          test_dup_fork_Homestead  test_dup_fork_Shanghai
...

inside ./tmp/, and inside each folder there will be several numbered subfolders with all the information about each call to the transition tool.

@shemnon @chfast let me know if this is helpful and whether you have any suggestions!

[spencer-tb]

LGTM! Works well on my end - I like t8n_dump_dir :D