Introduce various doc tag sniffs

[andrewnicols]

Replaces the following from moodlecheck:

• phpdocsinvalidtag
• phpdocsnotrecommendedtag
• phpdocsinvalidpathtag

https://github.com/moodlehq/moodle-local_moodlecheck/pull/136

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.63%. Comparing base (4a519fe) to head (6b37c7e).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #124 +/- ## ============================================ + Coverage 97.54% 97.63% +0.08% - Complexity 735 761 +26 ============================================ Files 32 33 +1 Lines 2160 2240 +80 ============================================ + Hits 2107 2187 +80 Misses 53 53 ```

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[andrewnicols]

p..d with the tearDown changes.

The fixture was also missing from the tearDown.

[stronk7]

Here we go! Thanks!