refactor(share/availability): simplify light availability #9484

Job	Run time
setup	1s
yamllint	7s
Markdown Lint	8s
hadolint / hadolint	5s
goreleaser	0s
upload-docs	0s
go-ci / Setup	1s
go-ci / Go Mod Tidy Check	23s
go-ci / Lint	2m 42s
go-ci / Lint Imports	7s
go-ci / Unit Tests Coverage (ubuntu-latest)	5m 15s
go-ci / Unit Tests Coverage (macos-14)	3m 45s
go-ci / Integration Tests / Integration Tests API	3m 4s
go-ci / Integration Tests / Da Tests Sync	2m 39s
go-ci / Integration Tests / Integration Tests Blob	2m 49s
go-ci / Integration Tests / Integration Tests Fraud	2m 26s
go-ci / Integration Tests / Integration Tests ND	2m 46s
go-ci / Integration Tests / Integration Tests p2p	2m 52s
go-ci / Integration Tests / Integration Tests Reconstruction	2m 26s
go-ci / Integration Tests / Integration Tests Sync	3m 7s
go-ci / Integration Tests / Integration Tests Sync	2m 31s
	37m 14s

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