[PWGLF] Added twoPhi trigger MC and renamed codes based on convention

[sawankumawat]

• Added code, ini, and test file for MC to trigger on events with at least two phi mesons
• Renamed the injected phiphi MC code based on the common convention in the repository
• Removed uncorrelated phi pairs from the injected MC

[github-actions]

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[sawankumawat]

The failure of Validate syntax / Pylint (pull_request) is some central issue, since other pull requests also have the same error.

[sawankumawat]

Dear @njacazio, could you please review the pull request?

Many thanks,
Sawan