fix: ephemeral linux symlinks checked into repository

[mtrezza]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Ephemeral symlinks should not be check in.

Related issue: #668

Approach

Add to gitignore.

TODOs before merging

n/a

[parse-github-assistant]

Thanks for opening this pull request!

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[codecov]

Codecov Report

Merging #753 (f566c51) into master (0400070) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #753   +/-   ##
======================================
  Coverage    3.34%   3.34%           
======================================
  Files           4       4           
  Lines         269     269           
======================================
  Hits            9       9           
  Misses        260     260           

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