chore(test-suite): move wallet storage persistence in the outer folder

[pshenmic]

Issue being fixed or feature implemented

Each run of test suite creates temporary files in test suite package directory, and they are messing with the current git changes. In this PR, I have added a env variable for setting custom directory for storing these files. Also, configured platform test suite to store this files in platform_root_dir/db directory.

What was done?

• Added FAUCET_WALLET_STORAGE_DIR env variable (or fall back to current working directory)
• Added faucet-wallet-use-storage and faucet-wallet-storage-dir in test.sh
• Updated test suite documentation
• Added new db directory in the root folder for holding temporary platform test suite files

How Has This Been Tested?

Locally + CI

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[shumkov]

LGTM 👍

[shumkov]

LGTM 👍

[shumkov]

👍