[@azure/monitor-opentelemetry-exporter] Resource metrics exporter doesn't use the right environment variable

[matteo-ladrat-Legrand]

• Package Name: @azure/monitor-opentelemetry-exporter
• Package Version: 1.0.0-beta.27
• Operating system: Darwin 24.2.0
• nodejs
  • version: v18.20.4
• browser
  • name/version:
• typescript
  • version:
• Is the bug related to documentation in
  • README.md
  • source code documentation
  • SDK API docs on https://learn.microsoft.com

Describe the bug
The method shouldCreateResourceMetric (code) doesn't follow the implementation in other SDK due to a typo in the environment variable used.

Based on the other sdk, we should set the environment variable APPLICATIONINSIGHTS_OPENTELEMETRY_RESOURCE_METRIC_DISABLED to true if we want to disable metrics related to the ressource. However, in the code, the method rely on ENV_OPENTELEMETRY_RESOURCE_METRIC_DISABLED which is the name of the constant defined here.
Imo, instead of process.env.ENV_OPENTELEMETRY_RESOURCE_METRIC_DISABLED, we should have process.env[ENV_OPENTELEMETRY_RESOURCE_METRIC_DISABLED] to use the correct environment variable name

To Reproduce
N/A

Expected behavior
The method should rely on APPLICATIONINSIGHTS_OPENTELEMETRY_RESOURCE_METRIC_DISABLED environment variables instead of ENV_OPENTELEMETRY_RESOURCE_METRIC_DISABLED

Screenshots
N/A

Additional context
N/A