Use authenticated npmrc

[chidozieononiwu]

This pull request updates the test pipeline configuration to improve npm authentication during test steps. The main change is the addition of a step to create an authenticated .npmrc file, ensuring npm commands use the correct credentials.

Pipeline authentication improvements:

• Added a step to generate an authenticated .npmrc file for npm commands by including the create-authenticated-npmrc.yml template and specifying the path as $(Agent.TempDirectory)/test/.npmrc.
• Updated the npm ci step to use the custom .npmrc file by setting the npm_config_userconfig environment variable.

openapi-diff

[mikeharder]

@chidozieononiwu: Why is this needed in this repo? Has this repo even been "onboarded" to ESRP?

[chidozieononiwu]

@chidozieononiwu: Why is this needed in this repo? Has this repo even been "onboarded" to ESRP?

It is being flagged by network isolation.