feat: bump the minimum required Git version from 2.0.0 to 2.34.1 (#8328)

- Resolves forgejo/discussions#324
- Remove all checks of `CheckGitVersionAtLeast` that checked for a version below 2.34.1
- The version was chosen because Debian stable supports 2.39.5 and Ubuntu 22.04 LTS supports 2.34.1

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8328
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>

modules/git/git_test.go

@@ -14,7 +14,6 @@ import (
 	"forgejo.org/modules/test"
 	"forgejo.org/modules/util"
 
-	"github.com/hashicorp/go-version"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -105,10 +104,6 @@ func TestSyncConfigGPGFormat(t *testing.T) {
 	})
 
 	t.Run("SSH format", func(t *testing.T) {
-		if CheckGitVersionAtLeast("2.34.0") != nil {
-			t.SkipNow()
-		}
-
 		r, err := os.OpenRoot(t.TempDir())
 		require.NoError(t, err)
 		f, err := r.OpenFile("ssh-keygen", os.O_CREATE|os.O_TRUNC, 0o700)
@@ -121,13 +116,6 @@ func TestSyncConfigGPGFormat(t *testing.T) {
 		assert.True(t, gitConfigContains("[gpg]"))
 		assert.True(t, gitConfigContains("format = ssh"))
 
-		t.Run("Old version", func(t *testing.T) {
-			oldVersion, err := version.NewVersion("2.33.0")
-			require.NoError(t, err)
-			defer test.MockVariableValue(&GitVersion, oldVersion)()
-			require.ErrorContains(t, syncGitConfig(), "ssh signing requires Git >= 2.34.0")
-		})
-
 		t.Run("No ssh-keygen binary", func(t *testing.T) {
 			require.NoError(t, r.Remove("ssh-keygen"))
 			require.ErrorContains(t, syncGitConfig(), "git signing requires a ssh-keygen binary")