chore(ci) move CodeQL analysis to its own recurring workflow

[thibaultcha]

See #503

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.36951%. Comparing base (3dbf52a) to head (43c5399).

Additional details and impacted files

[](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/550?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) ```diff @@ Coverage Diff @@ ## main #550 +/- ## ============================================= Coverage 90.36951% 90.36951% ============================================= Files 47 47 Lines 10311 10311 ============================================= Hits 9318 9318 Misses 993 993 ``` | [Flag](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/550/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/550/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | `90.13820% <ø> (ø)` | | | [valgrind](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/550/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | `81.21406% <ø> (+0.02129%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong#carryforward-flags-in-the-pull-request-comment) to find out more.