Bound Log: Change from argument to property. [1/6]

Any decorator that uses bound_log or log relies on it being in the
method call. Since non-global state has been removed, this no longer
is required. log is now an object attribute and accessed through self.

Currently OtterConfig is the only class with a log attribute.
Bound Log: Add log attribute to OtterLaunch. [2/6]
Bound Log: Add log attribute to OtterWebhooks. [3/6]
Bound Log: Add log attribute to OtterPolicies. [4/6]
Bound Log: Add log attribute to OtterGroups. [5/6]
Bound Log: Add log attribute to OtterExecute. [6/6]
Fix decorator tests for bound log changes.