Release 1.21.10/add macos support in filestore

[theyoprst]

Cherry-pick this: #1253

➜ git cherry-pick -x 682054e4 && git cherry-pick -x 96276584
[release-1.21.10/aff-macos-supoort-in-filestore e7f6bdec] Add macOS support in FileStore
 Author: Mikhail Cheshkov <mcheshkov@nebius.com>
 Date: Thu Jul 17 14:16:19 2025 +0200
 3 files changed, 31 insertions(+), 7 deletions(-)
 create mode 100644 internal/controller/sconfigcontroller/fs_darwin.go
 create mode 100644 internal/controller/sconfigcontroller/fs_linux.go
[release-1.21.10/aff-macos-supoort-in-filestore 7be04fc6] Setup simple lint check in CI for every interesting platform
 Author: Mikhail Cheshkov <mcheshkov@nebius.com>
 Date: Thu Jul 17 14:17:13 2025 +0200
 1 file changed, 44 insertions(+), 7 deletions(-)

Issue: #1289