Fix alarm silence-after-webhook expected for distinct contains matching

Reduce duplicate expected entries from 11 (2x resp_time + 2x percentile
+ 7x comp_rule) to 3 (1 of each rule). The previous expected relied on
the old buggy contains behavior where one actual item could satisfy
multiple expected entries.

Author: wu-sheng

test/e2e-v2/cases/alarm/expected/silence-after-webhook.yml

@@ -29,34 +29,6 @@ messages:
         value: WARNING
       - key: receivers
         value: lisi
-  - scopeId: 1
-    scope: SERVICE
-    name: e2e-service-provider
-    id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
-    id1: ""
-    ruleName: service_percentile_rule
-    alarmMessage: Percentile response time of service e2e-service-provider alarm in 3 minutes of last 10 minutes, due to more than one condition of p50 > 100, p75 > 100, p90 > 100, p95 > 100, p99 > 100.
-    startTime: {{ gt .startTime 0 }}
-    recoveryTime: {{ le .recoveryTime 0 }}
-    tags:
-      - key: level
-        value: WARNING
-      - key: receivers
-        value: lisi
-  - scopeId: 1
-    scope: SERVICE
-    name: e2e-service-provider
-    id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
-    id1: ""
-    ruleName: comp_rule
-    alarmMessage: Service e2e-service-provider response time is more than 100ms and sla is more than 1%.
-    startTime: {{ gt .startTime 0 }}
-    recoveryTime: {{ le .recoveryTime 0 }}
-    tags:
-      - key: level
-        value: CRITICAL
-      - key: receivers
-        value: zhangsan
   - scopeId: 1
     scope: SERVICE
     name: e2e-service-provider
@@ -90,71 +62,15 @@ messages:
     name: e2e-service-provider
     id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
     id1: ""
-    ruleName: comp_rule
-    alarmMessage: Service e2e-service-provider response time is more than 100ms and sla is more than 1%.
-    startTime: {{ gt .startTime 0 }}
-    recoveryTime: {{ le .recoveryTime 0 }}
-    tags:
-      - key: level
-        value: CRITICAL
-      - key: receivers
-        value: zhangsan
-  - scopeId: 1
-    scope: SERVICE
-    name: e2e-service-provider
-    id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
-    id1: ""
-    ruleName: comp_rule
-    alarmMessage: Service e2e-service-provider response time is more than 100ms and sla is more than 1%.
-    startTime: {{ gt .startTime 0 }}
-    recoveryTime: {{ le .recoveryTime 0 }}
-    tags:
-      - key: level
-        value: CRITICAL
-      - key: receivers
-        value: zhangsan
-  - scopeId: 1
-    scope: SERVICE
-    name: e2e-service-provider
-    id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
-    id1: ""
-    ruleName: comp_rule
-    alarmMessage: Service e2e-service-provider response time is more than 100ms and sla is more than 1%.
-    startTime: {{ gt .startTime 0 }}
-    recoveryTime: {{ le .recoveryTime 0 }}
-    tags:
-      - key: level
-        value: CRITICAL
-      - key: receivers
-        value: zhangsan
-  - scopeId: 1
-    scope: SERVICE
-    name: e2e-service-provider
-    id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
-    id1: ""
-    ruleName: comp_rule
-    alarmMessage: Service e2e-service-provider response time is more than 100ms and sla is more than 1%.
-    startTime: {{ gt .startTime 0 }}
-    recoveryTime: {{ le .recoveryTime 0 }}
-    tags:
-      - key: level
-        value: CRITICAL
-      - key: receivers
-        value: zhangsan
-  - scopeId: 1
-    scope: SERVICE
-    name: e2e-service-provider
-    id0: ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1
-    id1: ""
-    ruleName: comp_rule
-    alarmMessage: Service e2e-service-provider response time is more than 100ms and sla is more than 1%.
+    ruleName: service_percentile_rule
+    alarmMessage: Percentile response time of service e2e-service-provider alarm in 3 minutes of last 10 minutes, due to more than one condition of p50 > 100, p75 > 100, p90 > 100, p95 > 100, p99 > 100.
     startTime: {{ gt .startTime 0 }}
     recoveryTime: {{ le .recoveryTime 0 }}
     tags:
       - key: level
-        value: CRITICAL
+        value: WARNING
       - key: receivers
-        value: zhangsan
+        value: lisi
   - scopeId: 1
     scope: SERVICE
     name: e2e-service-provider