perf: improve scalability of session api (#9635)

This pull request improves the scalability of the session API by
enhancing middleware tracing and refining SQL query behavior for user
authentication methods.

# Which Problems Are Solved

- Eventstore subscriptions locked each other during they wrote the
events to the event channels of the subscribers in push.
- `ListUserAuthMethodTypesRequired` query used `Bitmap heap scan` to
join the tables needed.
- The auth and oidc package triggered projections often when data were
read.
- The session API triggered the user projection each time a user was
searched to write the user check command.

# How the Problems Are Solved

- the `sync.Mutex` was replaced with `sync.RWMutex` to allow parallel
read of the map
- The query was refactored to use index scans only
- if the data should already be up-to-date `shouldTriggerBulk` is set to
false
- as the user should already exist for some time the trigger was
removed.

# Additional Changes

- refactoring of `tracing#Span.End` calls

# Additional Context

- part of https://github.com/zitadel/zitadel/issues/9239

---------

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

internal/query/user.go

@@ -428,34 +428,6 @@ func (q *Queries) GetUserByLoginName(ctx context.Context, shouldTriggered bool,
 	return user, err
 }
 
-// Deprecated: use either GetUserByID or GetUserByLoginName
-func (q *Queries) GetUser(ctx context.Context, shouldTriggerBulk bool, queries ...SearchQuery) (user *User, err error) {
-	ctx, span := tracing.NewSpan(ctx)
-	defer func() { span.EndWithError(err) }()
-
-	if shouldTriggerBulk {
-		triggerUserProjections(ctx)
-	}
-
-	query, scan := prepareUserQuery(ctx, q.client)
-	for _, q := range queries {
-		query = q.toQuery(query)
-	}
-	eq := sq.Eq{
-		UserInstanceIDCol.identifier(): authz.GetInstance(ctx).InstanceID(),
-	}
-	stmt, args, err := query.Where(eq).ToSql()
-	if err != nil {
-		return nil, zerrors.ThrowInternal(err, "QUERY-Dnhr2", "Errors.Query.SQLStatment")
-	}
-
-	err = q.client.QueryRowContext(ctx, func(row *sql.Row) error {
-		user, err = scan(row)
-		return err
-	}, stmt, args...)
-	return user, err
-}
-
 func (q *Queries) GetHumanProfile(ctx context.Context, userID string, queries ...SearchQuery) (profile *Profile, err error) {
 	ctx, span := tracing.NewSpan(ctx)
 	defer func() { span.EndWithError(err) }()