Issue 48499: Use preferred SecurityPolicyManager.savePolicy() variant

[labkey-jeckels]

Rationale

We're uneven in terms of the validation and auditing we do for saving SecurityPolicies and related updates, and want to be more consistent.

Related Pull Requests

• Issue 48499: Use preferred SecurityPolicyManager.savePolicy() variant platform#4704

Changes

• Let modules register ContainerSecurableResourceProviders instead of having Container know about them all
• Remove the savePolicy and createContainer methods that don't take a user, check permissions, or log for audit purposes
• Introduce User.getAdminServiceUser() for sudo like scenarios or when we're doing an operation not initiated by a user, like bootstrapping the server
• Update callers