Update request symbols for code suggestions
This fixes the broken Request symbols graph on the Code Suggestion language dashboard.
This is because we have now tracked more symbols per languages than just imports
statement (code). This change ensures we report the sum of all symbols by language instead of a particular symbol.
https://dashboards.gitlab.net/dashboard/snapshot/8U8UFctgA1XweuygUFamUY7or73PdWp8
Edited by Tan Le