[QT-707] Change default service unit mode

[ryancragun]

Update vault.service and boundary.service systemd unit file mode to 0644 from 0640 to better comply with some distros expectations. consul.service already utilizes 0644

We also add a systemd deamon-reload after writing the configuration to ensure there's no mismatch between states.

• Change mode of vault.service and boundary.service to 0644
• systemd daemon-reload after writing unit files.
• Bump VERSION
• Update Go modules
• Regenerate provider docs with the latest docs generator

Checklist

• The commit message includes an explanation of the changes
• Manual validation of the changes have been performed (if possible)
• New or modified code has requisite test coverage (if possible)
• I have performed a self-review of the changes
• I have made necessary changes and/or pull requests for documentation
• I have written useful comments in the code
• Version file/release label updated, if release needed