cleanup(driver/ppm_fillers.c): create consistencies (s32 to int32_t) #4147

Job	Run time
build-libs-linux-amd64-asan 🧐	14m 24s
build-libs-linux-amd64 😁 (system_deps)	9m 41s
build-libs-emscripten 🧐	6m 57s
build-libs-linux-amd64 😁 (bundled_deps)	27m 6s
build-libs-linux-amd64 😁 (system_deps_w_chisels)	11m 24s
build-libs-linux-amd64-static 🎃	41m 54s
build-libs-linux-amd64 😁 (system_deps_minimal)	7m 54s
build-libs-others-amd64 😨 (windows-latest)	8m 35s
build-shared-libs-linux-amd64 🧐	5m 52s
build-libs-others-amd64 😨 (macos-latest)	8m 34s
build-shared-libs-macos-amd64 😨	3m 47s
paths-filter	8s
run-e2e-tests-amd64 (system_deps)	11m 54s
test-libs-static (bundled_deps)	30m 41s
run-e2e-tests-amd64 (bundled_deps)	30m 38s
run-e2e-tests-amd64 (system_deps_w_chisels)	12m 24s
run-e2e-tests-amd64 (asan)	33m 33s
test-drivers-x86 😇 (bundled_deps)	14m 26s
build-libs-s390x 😁 (system_deps)	1h 45m 28s
test-scap-x86 😆 (bundled_deps)	10m 28s
	6h 35m 48s

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