fix[ux]: syntax exception missing filename

[sandbubbles]

What I did

Print filename for syntax exceptions as in #4285.

How I did it

Rethrow syntax exceptions from a point where path is known (two places - one for natspec, one for the rest).

How to verify it

Commit message

Commit message for the final, squashed PR. (Optional, but reviewers will appreciate it! Please see our commit message style guide for what we would ideally like to see in a commit message.)

Description for the changelog

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[codecov]

Codecov Report

Attention: Patch coverage is 46.66667% with 8 lines in your changes missing coverage. Please review.

Project coverage is 46.08%. Comparing base (fcddb70) to head (67dcfb8).

Files with missing lines	Patch %	Lines
vyper/ast/parse.py	50.00%	3 Missing ⚠️
vyper/compiler/phases.py	50.00%	3 Missing ⚠️
vyper/exceptions.py	33.33%	2 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (fcddb70) and HEAD (67dcfb8). Click for more details.

HEAD has 138 uploads less than BASE

Flag	BASE (fcddb70)	HEAD (67dcfb8)
	139	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4343       +/-   ##
===========================================
- Coverage   91.35%   46.08%   -45.28%     
===========================================
  Files         112      112               
  Lines       15923    15937       +14     
  Branches     2691     2692        +1     
===========================================
- Hits        14546     7344     -7202     
- Misses        942     8036     +7094     
- Partials      435      557      +122     

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