Update alicloud_cms_alarm deprecated settings

[jonwtech]

Currently using the module with provider version > 1.94.0 produces deprecation warnings:

Warning: "operator": [DEPRECATED] Field 'operator' has been deprecated from provider version 1.94.0. New field 'escalations_critical.comparison_operator' instead.

Warning: "statistics": [DEPRECATED] Field 'statistics' has been deprecated from provider version 1.94.0. New field 'escalations_critical.statistics' instead.

Warning: "triggered_count": [DEPRECATED] Field 'triggered_count' has been deprecated from provider version 1.94.0. New field 'escalations_critical.times' instead.

Warning: "threshold": [DEPRECATED] Field 'threshold' has been deprecated from provider version 1.94.0. New field 'escalations_critical.threshold' instead.

This MR replaces these fields with the newer escalations_critical, escalations_warn, and escalations_info blocks.