TEMPORARY - DELETE ME: disable amazon-2/amazon-2023 platforms

Isolates a transient infra failure seen in build #8393 (exit_status -1,
silent agent death mid-openssl-compile on both platforms, unrelated to
postgres13 which had already resolved/downloaded successfully). Used to
get a clean build record without waiting on flaky instances.

Must be reverted before this PR merges.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: lbakerchef

.expeditor/release.omnibus.yml

@@ -21,7 +21,11 @@ builder-to-testers-map:
     - el-8-x86_64
   el-9-x86_64:
     - el-9-x86_64
-  amazon-2-x86_64:
-    - amazon-2-x86_64
-  amazon-2023-x86_64:
-    - amazon-2023-x86_64
+  # TEMPORARY - DELETE ME: amazon-2-x86_64 and amazon-2023-x86_64 disabled to
+  # isolate a transient infra failure (build #8393, exit_status -1, silent
+  # agent death mid-openssl-compile, unrelated to postgres13). Restore before
+  # merging.
+  # amazon-2-x86_64:
+  #   - amazon-2-x86_64
+  # amazon-2023-x86_64:
+  #   - amazon-2023-x86_64