Cleanup Whitespace in unittest/ directory

[SouradeepSaha]

Description

Trim unnecessary whitespace at the beginning and end of files in the unittest/ directory. Only addresses a subset of files from over 5500+ files currently having unnecessary whitespace. Note that all code changes are non-functional.

Release Notes

N/A

How can this PR be tested?

All tests are confirmed to pass by running the command ./mtr --suite=main.

Basing the PR against the correct MariaDB version

• This is a bug fix and the PR is based against the earliest maintained branch in which the bug can be reproduced.

PR quality check

• I checked the CODING_STANDARDS.md file and my PR conforms to this where appropriate.
• For any trivial modifications to the PR, I am ok with the reviewer making the changes themselves.

All new code of the whole pull request, including one or several files that are either new files or modified ones, are contributed under the BSD-new license. I am contributing on behalf of my employer Amazon Web Services, Inc.

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ grooverdan
❌ SouradeepSaha
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