[instrument_builder] Add filename validation on save

[victori444]

Brief summary of changes

Adds validation to the instrument builder module that prevents file names that aren't properly formatted from being saved. This includes files that:

• Contain spaces
• Contain special characters with the exception of "_"
• Contain multiple periods (aside from the extension period)
• End with a special character

Testing instructions (if applicable)

1. In the instrument builder, upload a linst file
2. In the save tab, test different file names in the first input box that break the rules set above
3. Verify that error messages appear accordingly and prevent the user from saving unless the file name respect each condition

Link(s) to related issue(s)

• Resolves [instrument_builder] Builder lets you save with file names that are not accepted to be loaded #10787