Add unit tests for some controller classes

[MauricioFauth]

These kind of tests are not great, as they're sensible to white space changes in the output, but it's better than nothing.

[MoonE]

@MauricioFauth This test occasionally fails because of the query duration 0.0000 <-> 0.0001

1) PhpMyAdmin\Tests\Controllers\Database\MultiTableQuery\QueryControllerTest::testController
Failed asserting that string matches format description.
--- Expected
+++ Actual
@@ @@
   
 <div class="card mb-3 result_query">
 <div class="alert alert-success border-top-0 border-start-0 border-end-0 rounded-bottom-0 mb-0" role="alert">
-  <img src="themes/dot.gif" title="" alt="" class="icon ic_s_success"> Showing rows 0 -  2 (3 total, Query took 0.0000 seconds.)
+  <img src="themes/dot.gif" title="" alt="" class="icon ic_s_success"> Showing rows 0 -  2 (3 total, Query took 0.0001 seconds.)
 </div>
 <div class="card-body sqlOuter"><pre><code class="sql" dir="ltr">SELECT `test_table`.* FROM `test_table`;</code></pre></div>
 <div class="card-footer tools d-print-none">

/app/tests/unit/Controllers/Database/MultiTableQuery/QueryControllerTest.php:60

[liviuconcioiu]

I have one too:

2) PhpMyAdmin\Tests\Controllers\Database\ImportControllerTest::testController
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'...may be compressed (gzip, bzip2, zip) or uncompressed.<br>\n
+'...may be compressed (gzip, zip) or uncompressed.<br>\n
               A compressed file's name must end in <strong>.[format].[compression]</strong>. Example: <strong>.sql.zip</strong>\n
             </p>\n
           \n
                       <div class="mb-3">\n
-              <label class="form-label" for="input_import_file">Browse your computer: <small>(Max: 2,048KiB)</small></label>\n
+              <label class="form-label" for="input_import_file">Browse your computer: <small>(Max: 1,024MiB)</small></label>\n
      ...'

E:\GitHub\phpmyadmin\tests\unit\Controllers\Database\ImportControllerTest.php:41