Update core vpc workflows to use reusable pipeline

[sukeshreddyg]

A reference to the issue / Description of it

Update core vpc workflows to use reusable pipeline

How does this PR fix the problem?

The creation of a reusable workflow resolves the problem of having multiple, redundant workflows for similar tasks. One reusable workflow can be called by various pipelines, eliminating the need to duplicate workflow logic across different projects.

Checklist (check x in [ ] of list items)

• [ x ] I have performed a self-review of my own code
• [ x ] All checks have passed
• I have made corresponding changes to the documentation
• [ x ] Plan and discussed how it should be deployed to PROD (If needed)

Additional comments (if any)

{Please write here}

[github-actions]

Trivy Scan Success

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</details> #### `Checkov Scan` Success
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CTFLint Scan Success

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Setting default tflint config...
Running tflint --init...
Installing "terraform" plugin...
Installed "terraform" (source: github.com/terraform-linters/tflint-ruleset-terraform, version: 0.5.0)
tflint will check the following folders:

Trivy Scan Success

Show Output

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Trivy will check the following folders:

[markgov]

LGTM