Add unit tests for `uploadPayload` #10552

Job	Run time
analyze-other (actions)	48s
check-codeql-versions	30s
analyze-other (python)	59s
analyze-javascript (windows-2025, linked)	7m 10s
analyze-javascript (ubuntu-24.04, linked)	3m 52s
analyze-javascript (ubuntu-22.04, linked)	3m 58s
analyze-javascript (ubuntu-24.04)	4m 12s
analyze-javascript (windows-2022, linked)	6m 21s
analyze-javascript (macos-13, linked)	8m 3s
analyze-javascript (windows-2025)	6m 25s
analyze-javascript (windows-2022)	6m 10s
analyze-javascript (macos-14, linked)	7m 0s
analyze-javascript (ubuntu-22.04)	4m 6s
analyze-javascript (macos-15, linked)	7m 39s
analyze-javascript (macos-14)	9m 7s
analyze-javascript (macos-13)	9m 2s
analyze-javascript (macos-15)	5m 45s
	1h 31m 7s

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