[CI] Generate full baseline upon PHPStan failure

I actually ran into this issue earlier today by chance (the paths not being correct).

This looks good and will make some things easier, but also allow for a good interface in gitlab for changes as per #3499245: [CI] Report PHPStan baseline statistics in job.

All good, working as intended :)

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As per Alex, we need a comment there, i understand it feels fragile, unfortunately a result of how things are run.

Actually just reviewed a ticket that could of used this so perfect timing!

Believe feedback for a comment has been added so going to mark it.

I tried to commit this but it's breaking the pre-commit script:

Running PHPStan on changed files.
 ------ ----------------------------------------------------------------------- 
  Line                                                                          
 ------ ----------------------------------------------------------------------- 
  408    Syntax error, unexpected '"' on line 408                               
  408    Syntax error, unexpected T_STRING on line 408                          
  409    Syntax error, unexpected T_NS_SEPARATOR on line 409                    
  409    Syntax error, unexpected T_STRING on line 409                          
  426    Syntax error, unexpected T_LNUMBER on line 426                         
  450    Syntax error, unexpected T_STRING on line 450                          
  451    Syntax error, unexpected T_STRING on line 451                          
  479    Syntax error, unexpected T_STRING on line 479                          
  480    Syntax error, unexpected T_STRING on line 480                          
  514    Syntax error, unexpected '.' on line 514                               
  555    Syntax error, unexpected T_CONSTANT_ENCAPSED_STRING on line 555        
  555    Syntax error, unexpected T_STRING on line 555                          
  556    Syntax error, unexpected T_CONSTANT_ENCAPSED_STRING on line 556        
  556    Syntax error, unexpected T_STRING on line 556                          
  557    Syntax error, unexpected '"', expecting '-' or T_STRING or T_VARIABLE  
         or T_NUM_STRING on line 557                                            
  557    Syntax error, unexpected T_STRING, expecting T_VARIABLE or             
         T_ENCAPSED_AND_WHITESPACE or T_DOLLAR_OPEN_CURLY_BRACES or             
         T_CURLY_OPEN on line 557                                               

I think because line 406 has the PHP open tag:

        echo "<?php return [];" > ./core/.phpstan-baseline.php

then PHPStan tries to interpret the YAML as PHP and it all goes wrong. Either we need to tell PHPStan to ignore this file, or remove the open tag, or break it up into two parts so PHPStan can't see it?

With all the recent rebasing people have to do around the baseline it would be nice to get this one in please :)

This is kinda messy, but I tried some alternatives that didn't work or were more messy, so I think this will have to do.

I am not sure we need all those $CI_PROJECT_DIRs as we are inconsistent there too, but let's just get this in and solve that elsewhere as we will surely make more changes here in the near future.

Committed 655596f and pushed to 11.x. Thanks!