Synthetics.yml - cpp/global-use-before-init performance

[felickz]

Consider if we want to restrict this query for perf reasons

[179/181 eval 85m50s] Evaluation done; writing results to codeql/cpp-queries/Critical/GlobalUseBeforeInit.bqrs.

[felickz]

https://github.com/ioquake/ioq3

If we remove these 3 guys, scan goes through in 6 mins. With any of these, it takes hours.

• cpp/global-use-before-init
• cpp/divide-by-zero-using-return-value
• tob/cpp/unsafe-implicit-conversions