Update DB requirements in the documentation

See merge request !11293

Clean up ci variables table

Closes #31799

See merge request !11186

Add a new column before creating rename triggers

See merge request !11297

Update installation.md - Updated the Ruby section.

See merge request !11251

fixed small typo - piplnie should be pipeline

See merge request !11296

POC: Use position sticky on merge request tabs

See merge request !11289

MySQL doesn't allow us to create a trigger for a column that doesn't
exist yet. Failing with this error:

```
Mysql2::Error: Unknown column 'build_events' in 'NEW': CREATE TRIGGER trigger_6a80c097c862_insert
BEFORE INSERT
ON `services`
FOR EACH ROW
SET NEW.`build_events` = NEW.`job_events`
```

Creating the new column before creating the trigger avoids this.

Add summary lines for collapsed details in the bug report template

See merge request !11280

Include blob content when printing page

Closes #31781

See merge request !11247