[CI] issue: HPCINFRA-4050 Replace webrepo address with geoDNS address

[ntsemah]

Description

What

Replace webrepo.mtr.labs.mlnx with a geoDNS webrepo.gtm.nvidia.com to fix repository timeout issues.
Remove yara-devel package installation due to missing dependencies

Why ?

HPCINFRA-4050

How ?

It is optional but for complex PRs please provide information about the design,
architecture, approach, etc.

Change type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

Check list

• Code follows the style de facto guidelines of this project
• Comments have been inserted in hard to understand places
• Documentation has been updated (if necessary)
• Test has been added (if possible)

[greptile-apps]

Greptile Summary

• Adds WEBREPO_URL argument and sed replacement to switch from old webrepo address to geoDNS address webrepo.gtm.nvidia.com for repository timeout fix
• Removes yara-devel package from Oracle Linux 9.4 Dockerfile dependencies

Confidence Score: 1/5

• This PR has critical implementation issues that will prevent the webrepo replacement from working
• The sed command on line 11 searches for the literal string $WEBREPO_URL but the repo files contain actual URLs like http://webrepo, making the replacement ineffective. Previous comments correctly identified this as a critical bug requiring the pattern from Dockerfile.rhel8.6:40
• .ci/dockerfiles/Dockerfile.ol9.4 requires immediate attention - the sed pattern must be fixed before merge

Important Files Changed

Filename	Overview
.ci/dockerfiles/Dockerfile.ol9.4	Added WEBREPO_URL replacement logic with incorrect sed pattern and removed yara-devel dependency

Sequence Diagram

sequenceDiagram
    participant Docker as "Docker Build"
    participant Dockerfile as "Dockerfile.ol9.4"
    participant YumRepos as "/etc/yum.repos.d/*.repo"
    participant YumCache as "Yum Cache"
    
    Docker->>Dockerfile: "Build Oracle Linux 9.4 image"
    Dockerfile->>Dockerfile: "Set WEBREPO_URL=webrepo.gtm.nvidia.com"
    Dockerfile->>YumRepos: "sed replace $WEBREPO_URL in repo files"
    YumRepos-->>Dockerfile: "URLs updated"
    Dockerfile->>YumCache: "yum clean all"
    Dockerfile->>YumCache: "yum makecache"
    YumCache-->>Dockerfile: "Cache refreshed"
    Dockerfile->>Dockerfile: "Install packages (without yara-devel)"
    Dockerfile-->>Docker: "Image built"

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[ntsemah]

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