[agent-control-deployment] bump agent-control image tag to 1.15.0 (#2269)

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#### What this PR does / why we need it:

This PR bumps agent-control image tag to 1.15.0

#### Checklist
[Place an '[x]' (no spaces) in all applicable fields. Please remove
unrelated fields.]
- [x] Chart Version bumped
- [ ] Variables are documented in the README.md
- [x] Title of the PR starts with chart name (e.g. `[mychartname]`)

# Release Notes to Publish (nr-k8s-otel-collector)
If this PR contains changes in `nr-k8s-otel-collector`, please complete
the following section. All other charts should ignore this section.

<!--BEGIN-RELEASE-NOTES-->
## 🚀 What's Changed
* Tell the world about the latest changes in the chart.
<!--END-RELEASE-NOTES-->

Author: sigilioso

charts/agent-control-deployment/Chart.yaml

@@ -4,7 +4,7 @@ description: A Helm chart to install New Relic Agent Control on Kubernetes
 
 type: application
 
-version: 1.7.3
+version: 1.7.4
 
 dependencies:
   - name: common-library

charts/agent-control-deployment/values.yaml

@@ -19,7 +19,7 @@ subAgentsNamespace: "newrelic"
 image:
   registry:
   repository: newrelic/newrelic-agent-control
-  tag: "1.14.1"
+  tag: "1.15.0"
   pullPolicy: IfNotPresent
   # -- The secrets that are needed to pull images from a custom registry.
   pullSecrets: []
@@ -31,7 +31,7 @@ image:
 toolkitImage:
   registry:
   repository: newrelic/newrelic-agent-control-cli
-  tag: "1.14.1"
+  tag: "1.15.0"
   pullPolicy: IfNotPresent
   # -- The secrets that are needed to pull images from a custom registry.
   pullSecrets: []