ITEM.VALUE acts like ITEM.LASTVALUE in annotations

[Akint]

Describe the bug
When {ITEM.VALUE} macros is used in a trigger name and annotations of this trigger occurs multiple times on a single graph, the macros is resolved like {ITEM.LASTVALUE} on every occurrence.
As you can see on the screenshot below, annotation text is always too large: 5 for a trigger with condition item.last() > 1 and title too large: {ITEM.VALUE}.

Expected behavior
When possible, the historical (at-the-time-of-event) value should be seen in annotation text.
The screenshot below is a spoiler of how it works after my fix.

Software versions

Grafana	Zabbix	Grafana-Zabbix Plugin
6.6.1	4.0.17	3.10.5

P.S. May be a duplicate of #396, but the latter was never resolved.

[alexanderzobnin]

Hi! Yes, it's better to use event name for annotations, like you did in your commit, good work!