fix: update governance script to use more opinionated workflows (#502)

**Motivation:**

This PR updates several functions on the governance script to target
more opinionated workflows rather than batch governance functions
together in a generalized way.

**Modifications:**

- Remove all initRole functions besides allowing users to initialize a
new role, grant this role to role holders (optional), and grant
permissions to this role (optional).
- Limit create strategies functions to a single function that allows
users to create a single new strategy and grant role permissions only
using that strategy
- Remove `revokePolicy` functions in favor of a single
`updateRoleDescriptionAndRoleHolders`. This allows users to update one
role description and grant and remove role holders of that created role.
- Update the `createAccountAndSetRolePermissions` function so the
computed account address is used for granting permissions and require
permissions to only be granted not removed.

**Result:**

This governance script will help users fall in the pit of success with
more opinionated ways to self-govern their instance without overloading
actions.