[Internal] [Bug] Add Error Output For No Submission Config Provided

[ankushkgupta2]

What is the Bug Related To? Please Provide a Description. 
Currently, the pipeline continues to run through the main workflow and the submission entrypoints even if a correct path to a submission config is not provided. Need to conduct a check for the submission config immediately before running submission and terminate the program if it does not exist + provide a clear error for termination.

For the main workflow run, still run through validation/annotation despite a submission config not being provided, but terminate at the submission point.

Place an ❌ in a Box that Best Matches the Bug's Importance:

• [] 1 - Most severe (a full-break in core function)
• 2-4 - Moderate (break for a particular aspect/feature) (how integral is the broken feature?)
• [] 5 - Least severe (non-functional issue, such as inconsitency / error in documentation or administrative in nature) 

Please Complete the Following Information:

• OS: [e.g. iOS]: Windows
• Browser [e.g. chrome, safari]: N/A
• Version [e.g. 22]: N/A
• Run environment (container, cloud service, HPC, platform, etc.): nextflow --> conda, docker, singularity

Please Outline Necessary Steps to Replicate Bug (Go to.. Click on... Install the following... etc.):
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Any Additional Context or Information? Has There Been Any Progress Made So Far Towards this Request? Any Concrete Instructions to Resolve the Bug or Helpful Resources to Reference? Screenshots or Logs?
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