feat(controller): support receiving `MultipartFile`s #8614

Job	Run time
Build Java and TypeScript for other tasks	2m 38s
Test TypeScript	1m 22s
Check style	1m 22s
Gradle tests (ubuntu-latest)	1m 12s
ITs (ubuntu-latest, group-1)	1m 20s
Gradle tests (windows-latest)	1m 5s
Test Java	1m 20s
ITs (ubuntu-latest, group-2)	1m 21s
ITs (ubuntu-latest, some)	1m 19s
Tests Summary	4s
	13m 3s

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