Remove Event.wrapper for Logins telemetry

[Alexandru2909]

Breakout from #21292.

┆Issue is synchronized with this Jira Task

[LaurentiuApahideanSV]

I tested the issue on Firefox Nightly 2022-04-13 by changing the setting to save logins and observing the events that are sent

Save logins and passwords setting is set to "Ask to save"
{
"timestamp": 51110,
"category": "logins",
"name": "save_logins_setting_changed",
"extra": {
"setting": "NEVER_SAVE"
}
},

Save logins and passwords setting is set to "Never save"
{
"timestamp": 52308,
"category": "logins",
"name": "save_logins_setting_changed",
"extra": {
"setting": "ASK_TO_SAVE"
}
Glean dashboard

Device used:

• OnePlus 6T (Android 9)