[LabKey CI] Remove MS2 GWT code

[labkey-jeckels]

Tasks 📍

• Convert MS2 pipeline jobs to FileAnalysisJobs
• Enable simple XML job launcher for XTandem
• Get default parameters working
• Enable simple XML job launcher for other search engines
• Remove GWT code
• Reach out to Novartis for use cases @keith-labkey
• Delete fraction rollup job
• Check for need to support WAITING FOR FILES
• Remove unused constructors, etc
• Delete MS2's SearchAction
• Update tests
• Manual test @labkey-ians 📌
• Code review @labkey-adam
• Docs handoff
• Merge