Do not block apt publishing if there is a more current pre-release

We do not publish pre-releases to apt repos, but we do publish them to
github.  That means we need to filter them out when considering if an
apt release should be published.  We don't want v8.3.3 to be blocked by
v9.0.0-dev.1, only by v9.0.0.

Honestly, this is a bit of a mess, but it only needs to hold out a bit
longer until #10746 lands.

Contributes to #10800

build.assets/tooling/cmd/check/main.go

@@ -90,6 +90,12 @@ func checkLatest(ctx context.Context, tag string, gh github.GitHub) error {
 		if r.GetDraft() {
 			continue
 		}
+		// Because pre-releases are not published to apt, we do not want to
+		// consider them when making apt publishing decisions.
+		// see: https://github.com/gravitational/teleport/issues/10800
+		if semver.Prerelease(r.GetTagName()) != "" {
+			continue
+		}
 		tags = append(tags, r.GetTagName())
 	}
 

build.assets/tooling/cmd/check/main_test.go

@@ -105,6 +105,15 @@ func TestCheckLatest(t *testing.T) {
 			},
 			wantErr: require.NoError,
 		},
+		{ // see https://github.com/gravitational/teleport/issues/10800
+			desc: "pass-pre-release",
+			tag:  "v8.3.3",
+			releases: []string{
+				"v9.0.0-beta.1",
+				"v8.3.2",
+			},
+			wantErr: require.NoError,
+		},
 	}
 	for _, test := range tests {
 		t.Run(test.desc, func(t *testing.T) {