[Uptime] Simplify snapshot max to Infinity (#55931) (#56064)

Fixes elastic/uptime#119

Rather than relying on a contant for the max number of monitors, it's
easier to just use infinity. This is simpler than making the iterator
more complex with an 'infinite' mode.

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/legacy/plugins/uptime/common/constants/context_defaults.ts

@@ -19,10 +19,4 @@ export const CONTEXT_DEFAULTS = {
     cursorDirection: CursorDirection.AFTER,
     sortOrder: SortOrder.ASC,
   },
-
-  /**
-   * Defines the maximum number of monitors to iterate on
-   * in a single count session. The intention is to catch as many as possible.
-   */
-  MAX_MONITORS_FOR_SNAPSHOT_COUNT: 1000000,
 };

x-pack/legacy/plugins/uptime/server/lib/adapters/monitor_states/elasticsearch_monitor_states_adapter.ts

@@ -61,7 +61,7 @@ export const elasticsearchMonitorStatesAdapter: UMMonitorStatesAdapter = {
       dateRangeEnd,
       CONTEXT_DEFAULTS.CURSOR_PAGINATION,
       filters && filters !== '' ? JSON.parse(filters) : null,
-      CONTEXT_DEFAULTS.MAX_MONITORS_FOR_SNAPSHOT_COUNT,
+      Infinity,
       statusFilter
     );