Don't consider a term replaced if it is in an element with glossify-exclude

Totally makes sense! Thanks for the fix!

I added a test to reproduce this issue. Here is the test output without the changes by @prudloff in place:

There was 1 failure:

1) Drupal\Tests\glossify\Unit\GlossifyBaseTest::testParseTooltipMatch with data set "set32" ('<div class="glossify-exclude"...ified.', [stdClass Object (...)], true, true, 'tooltips', false, '', '', '<div class="glossify-exclude"...ified.')
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'...><a>RT</a></div> Here is <span title="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularized in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.">RT</span> that should be glossified.'
+'...><a>RT</a></div> Here is RT that should be glossified.'

/var/www/html/web/modules/custom/glossify/tests/src/Unit/GlossifyBaseTest.php:35

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