Manually iterate over calendardata when oracle is used

[juliusknorr]

This fixes running the CalDAVRemoveEmptyValue repair step on Oracle. Since we cannot apply a like clause on the blob field calendardata, we need to iterate over the table and to the filtering in PHP.

[nickvergessen]

/backport to stable20

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 35386: failure

mysql8.0-php7.4

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There were 2 warnings:

1) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

2) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

--

There was 1 failure:

1) Test\User\DatabaseTest::testSearch
Failed asserting that actual size 3 matches expected size 2.

/drone/src/tests/lib/User/Backend.php:114
/drone/src/tests/lib/User/DatabaseTest.php:125

mysql5.6-php7.3

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There were 2 warnings:

1) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

2) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

--

There was 1 failure:

1) Test\Repair\CleanTagsTest::testRun
Assert tag entries count after cleaning tag entries
Failed asserting that '1' matches expected 2.

/drone/src/tests/lib/Repair/CleanTagsTest.php:125
/drone/src/tests/lib/Repair/CleanTagsTest.php:92