Validation: reject binary property input files for custom components

[ptitzler]

This PR updates pipeline validation as follows.

• For generic components file dependencies text files or binary files are considered valid input, as shown below:

  

• For custom components input files only text files are considered valid input. The example below would trigger a validation error:

Closes #3020

Signed-off-by: Patrick Titzler [email protected]

What changes were proposed in this pull request?

• See above

How was this pull request tested?

• Manual testing
• Added/updated validation tests

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[kiersten-stokes]

Working great!