Fix warnings detected by phpcs & phpunit

[fredden]

While working on another change, I followed the instructions in the README which say to run vendor/bin/phpunit && vendor/bin/phpcs --standard=Magento2 Magento2/ --extensions=php. These reported errors which were unrelated to the changes I was making. This pull request solves those errors.

For reference, the output of the above commands used to be:

app@8a43352ec6d2:~/html$ vendor/bin/phpunit && vendor/bin/phpcs --standard=Magento2 Magento2/ --extensions=php
PHPUnit 9.5.20 #StandWithUkraine

...........................................W...................  63 / 204 ( 30%)
............................................................... 126 / 204 ( 61%)
....................................S.......................... 189 / 204 ( 92%)
...............                                                 204 / 204 (100%)

Time: 00:06.970, Memory: 134.50 MB

There was 1 warning:

1) Warning
No tests found in class "Magento2\Tests\PHPCompatibility\BaseSniffTest".

phpvfscomposer:///var/www/html/vendor/phpunit/phpunit/phpunit:97

WARNINGS!
Tests: 204, Assertions: 160, Warnings: 1, Skipped: 1.

FILE: /var/www/html/Magento2/Tests/PHPCompatibility/ForbiddenFinalPrivateMethodsUnitTest.php
--------------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
--------------------------------------------------------------------------------------------
 40 | WARNING | [x] Line indented incorrectly; expected at least 8 spaces, found 7
--------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
--------------------------------------------------------------------------------------------

Time: 6.76 secs; Memory: 22MB

app@8a43352ec6d2:~/html$ 

and is now

app@8a43352ec6d2:~/html$ vendor/bin/phpunit && vendor/bin/phpcs --standard=Magento2 Magento2/ --extensions=php
PHPUnit 9.5.20 #StandWithUkraine

...............................................................  63 / 203 ( 31%)
............................................................... 126 / 203 ( 62%)
...................................S........................... 189 / 203 ( 93%)
..............                                                  203 / 203 (100%)

Time: 00:06.908, Memory: 134.50 MB

OK, but incomplete, skipped, or risky tests!
Tests: 203, Assertions: 160, Skipped: 1.
app@8a43352ec6d2:~/html$ 

[sivaschenko]

@magento import pr to magento-commerce/magento-coding-standard

[m2-github-services]

@sivaschenko the Pull Request is successfully imported.