enhancement(observability): update check-event script (#12004)

* remove all skip check-events

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* remove skip check-events from script

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* batch: rename LargeEventDropped and update counters

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* vrl: update sent metrics

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* docker-logs: update message

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* fluent: update FluentMessageDecodeError

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* http: update GotHttpError

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* k8s: rename with Error ending

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* logplex: update error

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* syslog: update errors

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* udp: update errors

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* unix: update errors

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* unix: fix mismatch

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* http: update debug to error

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* check-events: ensure errors have log with error level

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>

* check-events: fix message when variable

Signed-off-by: Jérémie Drouet <jeremie.drouet@datadoghq.com>