Fix missing Close when error occurs and abused connection pool (#35658)

Fix #35649

* Use upstream `git-lfs-transfer`
* The Close should be called when error occurs (bug fix)
* The connection pool should be shared (bug fix)
* Add more tests to cover "LFS over SSH download"

go.mod

@@ -35,7 +35,7 @@ require (
 	github.com/bohde/codel v0.2.0
 	github.com/buildkite/terminal-to-html/v3 v3.16.8
 	github.com/caddyserver/certmagic v0.24.0
-	github.com/charmbracelet/git-lfs-transfer v0.2.0
+	github.com/charmbracelet/git-lfs-transfer v0.1.1-0.20251013092601-6327009efd21
 	github.com/chi-middleware/proxy v1.1.1
 	github.com/dimiro1/reply v0.0.0-20200315094148-d0136a4c9e21
 	github.com/djherbis/buffer v1.2.0
@@ -56,7 +56,7 @@ require (
 	github.com/go-co-op/gocron v1.37.0
 	github.com/go-enry/go-enry/v2 v2.9.2
 	github.com/go-git/go-billy/v5 v5.6.2
-	github.com/go-git/go-git/v5 v5.16.2
+	github.com/go-git/go-git/v5 v5.16.3
 	github.com/go-ldap/ldap/v3 v3.4.11
 	github.com/go-redsync/redsync/v4 v4.13.0
 	github.com/go-sql-driver/mysql v1.9.3
@@ -121,7 +121,7 @@ require (
 	golang.org/x/net v0.44.0
 	golang.org/x/oauth2 v0.30.0
 	golang.org/x/sync v0.17.0
-	golang.org/x/sys v0.36.0
+	golang.org/x/sys v0.37.0
 	golang.org/x/text v0.30.0
 	google.golang.org/grpc v1.75.0
 	google.golang.org/protobuf v1.36.8
@@ -298,9 +298,6 @@ replace github.com/hashicorp/go-version => github.com/6543/go-version v1.3.1
 
 replace github.com/nektos/act => gitea.com/gitea/act v0.261.7-0.20251003180512-ac6e4b751763
 
-// TODO: the only difference is in `PutObject`: the fork doesn't use `NewVerifyingReader(r, sha256.New(), oid, expectedSize)`, need to figure out why
-replace github.com/charmbracelet/git-lfs-transfer => gitea.com/gitea/git-lfs-transfer v0.2.0
-
 replace git.sr.ht/~mariusor/go-xsd-duration => gitea.com/gitea/go-xsd-duration v0.0.0-20220703122237-02e73435a078
 
 exclude github.com/gofrs/uuid v3.2.0+incompatible