Metric zero

[bwagner5]

Issue #, if available:
#374

Description of changes:

• zeros metrics when registered

> ec2-metadata-mock -d 100000 &
> go run cmd/node-termination-handler.go -enable-prometheus-server --dry-run --node-name test --metadata-url http://localhost:1338 -enable-scheduled-event-draining=false
> curl http://localhost:9092/metrics

# HELP actions_node_total Number of actions per node
# TYPE actions_node_total counter
actions_node_total{otel_scope_name="aws.node.termination.handler",otel_scope_version=""} 0
# HELP events_error_total Number of errors in events processing
# TYPE events_error_total counter
events_error_total{otel_scope_name="aws.node.termination.handler",otel_scope_version=""} 0
...

> ec2-metadata-mock &
> go run cmd/node-termination-handler.go -enable-prometheus-server --dry-run --node-name test --metadata-url http://localhost:1338 -enable-scheduled-event-draining=false
> curl http://localhost:9092/metrics

# HELP actions_node_total Number of actions per node
# TYPE actions_node_total counter
actions_node_total{otel_scope_name="aws.node.termination.handler",otel_scope_version=""} 0
actions_node_total{node_action="cordon-and-drain",node_event_id="spot-itn-044b4639ef3811e75ffa8748538727f6ee75486fd7ac74e9ccd3a8185a8062b5",node_name="test",node_status="success",otel_scope_name="aws.node.termination.handler",otel_scope_version=""} 1
actions_node_total{node_action="pre-drain",node_event_id="spot-itn-044b4639ef3811e75ffa8748538727f6ee75486fd7ac74e9ccd3a8185a8062b5",node_name="test",node_status="success",otel_scope_name="aws.node.termination.handler",otel_scope_version=""} 1
# HELP events_error_total Number of errors in events processing
# TYPE events_error_total counter
events_error_total{otel_scope_name="aws.node.termination.handler",otel_scope_version=""} 0

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[pdk27]

LGTM 🚀