Refactoring: Simplify upload SARIF flow and reuse loaded flags #3068

Job	Run time
Go: tracing with custom build steps (ubuntu-latest, stable-20230403)	1m 1s
Go: tracing with custom build steps (macos-12, stable-20230403)	2m 52s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.13.5)	59s
Go: tracing with custom build steps (macos-12, stable-v2.13.5)	3m 24s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.14.6)	1m 7s
Go: tracing with custom build steps (macos-12, stable-v2.14.6)	2m 35s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.15.5)	1m 12s
Go: tracing with custom build steps (macos-latest, stable-v2.15.5)	2m 27s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.16.6)	1m 18s
Go: tracing with custom build steps (macos-latest, stable-v2.16.6)	2m 22s
Go: tracing with custom build steps (ubuntu-latest, default)	39s
Go: tracing with custom build steps (macos-latest, default)	2m 51s
Go: tracing with custom build steps (ubuntu-latest, linked)	45s
Go: tracing with custom build steps (macos-latest, linked)	3m 10s
Go: tracing with custom build steps (ubuntu-latest, nightly-latest)	1m 25s
Go: tracing with custom build steps (macos-latest, nightly-latest)	2m 56s
	31m 3s

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