Fix FIROptions module organization #5632

Job	Run time
quickstart (swift, macos-14, Xcode_15.3)	7m 9s
pod-lib-lint (ios, macos-14)	8m 22s
quickstart-ftl-cron-only	0s
pod-lib-lint (tvos, macos-14)	6m 22s
pod-lib-lint (macos, macos-14)	5m 11s
spm-package-resolved	49s
pod-lib-lint (watchos, macos-14)	2m 42s
storage-integration-tests (Swift)	33m 0s
storage-integration-tests (ObjC)	9m 57s
spm (iOS, macos-14, Xcode_15.2)	8m 23s
spm (iOS, macos-14, Xcode_16)	8m 44s
spm (tvOS, macos-14, Xcode_15.2)	3m 40s
spm (tvOS, macos-14, Xcode_16)	3m 44s
spm (macOS, macos-14, Xcode_15.2)	2m 34s
spm (macOS, macos-14, Xcode_16)	3m 33s
spm (catalyst, macos-14, Xcode_15.2)	2m 41s
spm (catalyst, macos-14, Xcode_16)	3m 25s
spm (watchOS, macos-14, Xcode_15.2)	4m 31s
spm (watchOS, macos-14, Xcode_16)	3m 50s
storage-cron-only	0s
	1h 58m 37s

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