* Lazy load plugins to avoid setup-unwrap cycle
* Remove commented blocks
* Refactor NewTestCluster, use single core cluster on basic plugin tests
* Set c.pluginDirectory in TestAddTestPlugin for setupPluginCatalog to work properly
* Add special path to mock plugin
* Move ensureCoresSealed to vault/testing.go
* Use same method for EnsureCoresSealed and Cleanup
* Bump ensureCoresSealed timeout to 60s
* Correctly handle nil opts on NewTestCluster
* Add metadata flag to APIClientMeta, use meta-enabled plugin when mounting to bootstrap
* Check metadata flag directly on the plugin process
* Plumb isMetadataMode down to PluginRunner
* Add NOOP shims when running in metadata mode
* Remove unused flag from the APIMetadata object
* Remove setupSecretPlugins and setupCredentialPlugins functions
* Move when we setup rollback manager to after the plugins are initialized
* Fix tests
* Fix merge issue
* start rollback manager after the credential setup
* Add guards against running certain client and server functions while in metadata mode
* Call initialize once a plugin is loaded on the fly
* Add more tests, update basic secret/auth plugin tests to trigger lazy loading
* Skip mount if plugin removed from catalog
* Fixup
* Remove commented line on LookupPlugin
* Fail on mount operation if plugin is re-added to catalog and mount is on existing path
* Check type and special paths on startBackend
* Fix merge conflicts
* Refactor PluginRunner run methods to use runCommon, fix TestSystemBackend_Plugin_auth
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