tools/pr_check: adapt for label categorization
tools/pr_check: adapt for label categorization

In [#10030][1] it was decided to rename all labels to reflect their
respective category. The labels "NEEDS SQUASHING" and "Waiting For Other
PR" are used in the `dist/tools/pr_check/pr_check.sh` script however, so
that script needs to be adapted.

[1]: https://github.com/RIOT-OS/RIOT/issues/10030

kYc0o/RIOT,yogo1212/RIOT,josephnoir/RIOT,gebart/RIOT,biboc/RIOT,BytesGalore/RIOT,aeneby/RIOT,ant9000/RIOT,RIOT-OS/RIOT,miri64/RIOT,kaspar030/RIOT,kYc0o/RIOT,aeneby/RIOT,ant9000/RIOT,A-Paul/RIOT,BytesGalore/RIOT,miri64/RIOT,rfuentess/RIOT,smlng/RIOT,jasonatran/RIOT,josephnoir/RIOT,OlegHahm/RIOT,toonst/RIOT,aeneby/RIOT,authmillenon/RIOT,A-Paul/RIOT,kbumsik/RIOT,toonst/RIOT,OTAkeys/RIOT,biboc/RIOT,OlegHahm/RIOT,cladmi/RIOT,lazytech-org/RIOT,jasonatran/RIOT,jasonatran/RIOT,lazytech-org/RIOT,cladmi/RIOT,lazytech-org/RIOT,rfuentess/RIOT,A-Paul/RIOT,OTAkeys/RIOT,x3ro/RIOT,mfrey/RIOT,kbumsik/RIOT,BytesGalore/RIOT,cladmi/RIOT,aeneby/RIOT,kbumsik/RIOT,cladmi/RIOT,mtausig/RIOT,ant9000/RIOT,rfuentess/RIOT,smlng/RIOT,aeneby/RIOT,kbumsik/RIOT,authmillenon/RIOT,kYc0o/RIOT,x3ro/RIOT,A-Paul/RIOT,mfrey/RIOT,kYc0o/RIOT,josephnoir/RIOT,OTAkeys/RIOT,smlng/RIOT,josephnoir/RIOT,ant9000/RIOT,miri64/RIOT,authmillenon/RIOT,basilfx/RIOT,x3ro/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,x3ro/RIOT,BytesGalore/RIOT,authmillenon/RIOT,lazytech-org/RIOT,josephnoir/RIOT,OlegHahm/RIOT,biboc/RIOT,yogo1212/RIOT,basilfx/RIOT,kaspar030/RIOT,jasonatran/RIOT,kbumsik/RIOT,basilfx/RIOT,lazytech-org/RIOT,A-Paul/RIOT,BytesGalore/RIOT,authmillenon/RIOT,biboc/RIOT,rfuentess/RIOT,cladmi/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,x3ro/RIOT,toonst/RIOT,OlegHahm/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,gebart/RIOT,basilfx/RIOT,mfrey/RIOT,yogo1212/RIOT,toonst/RIOT,mtausig/RIOT,smlng/RIOT,mtausig/RIOT,yogo1212/RIOT,miri64/RIOT,kYc0o/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,mfrey/RIOT,OlegHahm/RIOT,basilfx/RIOT,miri64/RIOT,kaspar030/RIOT,yogo1212/RIOT,OTAkeys/RIOT,gebart/RIOT,kaspar030/RIOT,biboc/RIOT,ant9000/RIOT,mtausig/RIOT,toonst/RIOT,gebart/RIOT,mfrey/RIOT,gebart/RIOT,mtausig/RIOT,OTAkeys/RIOT,kaspar030/RIOT,smlng/RIOT