refactor installation scripts

[tigattack]

resources/DeployVeeamConfiguration.ps1:

• Extract logic into functions
• Simplify user choice prompts
• Improve/fix support for configuring different job types
• Improve error handling & output
  • Fix/improve output for user
  • Pre-fill more information in GitHub issue
• Add -nonInteractive switches for job configuration functions (so-far unused, possible future functionality)
• Other misc. changes