perf(query): reduce user query duration (#10037)

# Which Problems Are Solved

The resource usage to query user(s) on the database was high and
therefore could have performance impact.

# How the Problems Are Solved

Database queries involving the users and loginnames table were improved
and an index was added for user by email query.

# Additional Changes

- spellchecks
- updated apis on load tests

# additional info

needs cherry pick to v3

(cherry picked from commit 4df138286b)

cmd/setup/config.go

@@ -153,6 +153,7 @@ type Steps struct {
 	s54InstancePositionIndex                *InstancePositionIndex
 	s55ExecutionHandlerStart                *ExecutionHandlerStart
 	s56IDPTemplate6SAMLFederatedLogout      *IDPTemplate6SAMLFederatedLogout
+	s58ReplaceLoginNames3View               *ReplaceLoginNames3View
 }
 
 func MustNewSteps(v *viper.Viper) *Steps {