[Storage] Improve how GetFile handles paths #13877

Job	Run time
check_and_prepare	19s
build-android-macos-14	10m 18s
build-android-ubuntu-22.04	7m 5s
build-android-windows-latest	16m 33s
build-tvos-macos-14	18m 34s
build-desktop-windows-latest-x64-openssl	10m 56s
build-ios-macos-14	18m 2s
build-desktop-ubuntu-22.04-x64-openssl	3m 6s
test-desktop-windows-latest-x64-openssl	7m 51s
test-desktop-ubuntu-22.04-x64-openssl	2m 34s
test-android-windows-latest-android_target-gameloop	3m 38s
test-android-macos-14-emulator_ftl_target-gameloop	5m 23s
test-android-macos-14-android_target-gameloop	3m 30s
test-android-ubuntu-22.04-android_target-gameloop	5m 8s
test-android-ubuntu-22.04-emulator_ftl_target-gameloop	4m 6s
test-android-windows-latest-emulator_ftl_target-gameloop	4m 0s
test-ios-macos-14-ios_target-gameloop	6m 40s
test-ios-macos-14-simulator_target-gameloop	7m 16s
test-tvos-macos-14-tvos_simulator	10m 12s
summarize-results	16s
attempt-retry	0s
	2h 25m 27s

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