MM-51768: Scrub username/password from SQL datasource (#22731)

https://mattermost.atlassian.net/browse/MM-51768
```release-note
NONE
```

server/channels/store/sqlstore/utils_test.go

@@ -6,6 +6,7 @@ package sqlstore
 import (
 	"testing"
 
+	"github.com/mattermost/mattermost-server/v6/model"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -160,3 +161,45 @@ func TestAppendMultipleStatementsFlag(t *testing.T) {
 		})
 	}
 }
+
+func TestSanitizeDataSource(t *testing.T) {
+	t.Run(model.DatabaseDriverPostgres, func(t *testing.T) {
+		testCases := []struct {
+			Original  string
+			Sanitized string
+		}{
+			{
+				"postgres://mmuser:mostest@localhost/dummy?sslmode=disable",
+				"postgres://%2A%2A%2A%2A:%2A%2A%2A%2A@localhost/dummy?sslmode=disable",
+			},
+			{
+				"postgres://localhost/dummy?sslmode=disable&user=mmuser&password=mostest",
+				"postgres://%2A%2A%2A%2A:%2A%2A%2A%2A@localhost/dummy?sslmode=disable",
+			},
+		}
+		driver := model.DatabaseDriverPostgres
+		for _, tc := range testCases {
+			out, err := SanitizeDataSource(driver, tc.Original)
+			require.NoError(t, err)
+			assert.Equal(t, tc.Sanitized, out)
+		}
+	})
+
+	t.Run(model.DatabaseDriverMysql, func(t *testing.T) {
+		testCases := []struct {
+			Original  string
+			Sanitized string
+		}{
+			{
+				"mmuser:mostest@tcp(localhost:3306)/mattermost_test?charset=utf8mb4,utf8&readTimeout=30s&writeTimeout=30s",
+				"****:****@tcp(localhost:3306)/mattermost_test?readTimeout=30s&writeTimeout=30s&charset=utf8mb4%2Cutf8",
+			},
+		}
+		driver := model.DatabaseDriverMysql
+		for _, tc := range testCases {
+			out, err := SanitizeDataSource(driver, tc.Original)
+			require.NoError(t, err)
+			assert.Equal(t, tc.Sanitized, out)
+		}
+	})
+}