Refactor deploy_plugins() in deploy_plugins.py

This is an unfinished refactoring sub-task coming from the [Add Pylint as a python static code analyzer #298](https://github.com/bitovi/bitops/pull/298).

The `deploy_plugins()` function in `deploy_plugins.py` is failing pylint check on:
> scripts/plugins/deploy_plugins.py:24:0: R0914: Too many local variables (36/15) (too-many-locals)
> scripts/plugins/deploy_plugins.py:24:0: R0912: Too many branches (19/12) (too-many-branches)
> scripts/plugins/deploy_plugins.py:24:0: R0915: Too many statements (104/50) (too-many-statements)

The function has more than 250+ lines and pylint with multiple warnings is a great indicator that it needs to be restructured and divided into smaller logical pieces. For instance:
* Extract it into a new `Plugin` class perhaps with another layer `PluginDeployer` (note: `PluginInstaller` #329 ) with multiple methods, so the interface would be `Plugin.deploy()` that we can call while iterating over each plugin in the sequence.
* Then another class `PluginConfig` would handle plugin config parsing and processing.

The check is silenced for now, don't forget to unsilence it when the refactoring is done.

Start in scripts/plugins/deploy_plugins.py by reading deploy_plugins() and the currently silenced pylint warnings: too-many-locals, too-many-branches, and too-many-statements. Review the related Add Pylint pull request #298 and the PluginInstaller follow-up #329 for context. Done means the function is restructured, the pylint check is unsilenced, and these warnings no longer occur.

Written by the indexing model from the issue text.