revert: Revert Manual NPM Linux Dockerfile perl-base Package Installation

[rayaisaiah]

Reason for Change:
Reverts manual package installations made to the NPM Linux dockerfile for perl-base 5.38.2-3.2ubuntu0.2 made here #3922. These changes were made as NPM base image (Ubuntu) did not have the updated packages installed which lead to CVEs on the base image. Ubuntu has since been patched to have the CVEs resolved so there is no need to manually install the packages at a specific version.

Trivy:

isaiah@CPC-isaia-1HIMP:~/AzureRepo/azure-container-networking$  trivy --scanners vuln image  --ignore-unfixed -f table  acnpublic.azurecr.io/azure-npm:pertBaseRemoved
2025-08-13T18:21:05Z    INFO    [vuln] Vulnerability scanning is enabled
2025-08-13T18:21:08Z    INFO    Detected OS     family="ubuntu" version="24.04"
2025-08-13T18:21:08Z    INFO    [ubuntu] Detecting vulnerabilities...   os_version="24.04" pkg_num=110
2025-08-13T18:21:08Z    INFO    Number of language-specific files       num=1
2025-08-13T18:21:08Z    INFO    [gobinary] Detecting vulnerabilities...

acnpublic.azurecr.io/azure-npm:pertBaseRemoved (ubuntu 24.04)

Total: 0 (UNKNOWN: 0, LOW: 0, MEDIUM: 0, HIGH: 0, CRITICAL: 0)

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• relevant PR labels added

Notes:

[rayaisaiah]

/azp run Azure Container Networking PR, NPM Scale Test, NPM Conformance Tests

[Copilot]

Pull Request Overview

This PR reverts the manual installation of a specific version of perl-base package from the NPM Linux Dockerfile. The change removes the explicitly pinned perl-base version 5.38.2-3.2ubuntu0.2 that was previously added to address CVEs, as the Ubuntu base image has since been updated to include the necessary security fixes.

• Removes explicit perl-base package installation with version pinning
• Simplifies the apt-get install command by relying on base image packages
• Reduces maintenance overhead by removing manual package version management

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[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[rayaisaiah]

Scale: https://msazure.visualstudio.com/One/_build/results?buildId=133740549&view=results
Conformance: https://msazure.visualstudio.com/One/_build/results?buildId=133755684&view=results