fix: Fix regression of skipping identical ARM deployment

[tbarlow12]

• [x] Added enum ArmParamType for commonly used parameter types within ARM templates
• [x] Ignoring identity property on resources for comparison, since that does not appear in ARM template from previous deployments
• [x] Added deepEqual to utility class with optional normalizer
• [x] Moved AzureKeyVaultConfig to serverless.ts near other config models
• [x] Added ArmParameter interface

Resolves issue of not being able to skip previous deployments due to identity as well as mismatch in casing of type within ARM parameters