main.star: stop running typesalias builder beyond Go 1.24

Based on the issue, these builders weren't intended to stick around
beyond Go 1.24. Update 'exists' to take into account that Go tip is
at 1.25, and x/tools will soon be upgraded to language version 1.23.

For golang/go#68798.

Change-Id: I15cb4813026de894ccd6d7dd4c8c5c32cbf114a2
Reviewed-on: https://go-review.googlesource.com/c/build/+/648695
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Robert Findley <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: dmitshur

generated/commit-queue.cfg

@@ -12099,10 +12099,6 @@ config_groups {
         name: "golang/security-try/gotip-linux-amd64-staticlockranking"
         disable_reuse: true
       }
-      builders {
-        name: "golang/security-try/gotip-linux-amd64-typesalias"
-        disable_reuse: true
-      }
       builders {
         name: "golang/security-try/gotip-linux-amd64_c2s16-perf_pgo_vs_oldest_stable"
         includable_only: true
@@ -14390,10 +14386,6 @@ config_groups {
           path_regexp: "src/runtime/[^/]+"
         }
       }
-      builders {
-        name: "golang/try/gotip-linux-amd64-typesalias"
-        disable_reuse: true
-      }
       builders {
         name: "golang/try/gotip-linux-amd64_c2s16-perf_pgo_vs_oldest_stable"
         includable_only: true
@@ -43207,10 +43199,6 @@ config_groups {
         includable_only: true
         disable_reuse: true
       }
-      builders {
-        name: "golang/try/x_tools-gotip-linux-amd64-typesalias"
-        disable_reuse: true
-      }
       builders {
         name: "golang/try/x_tools-gotip-linux-amd64_c2s16-perf_vs_parent"
         includable_only: true