taglist: Remove (scope call) annotation from gst_tag_register()

This was added in 7fdb15d6 but it is wrong. (scope call) is for
closures that only have to stay valid for the scope of the call, but the
tag merge function has to stay valid for the whole lifetime of the
application instead.

There's no appropriate scope annotation for that so we have to skip
these functions for now.
8 jobs for register-tag-scope in 17 minutes and 55 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Preparation
passed #88546
gst indent

00:00:42

passed #88545
manifest

00:00:44

 
  Build
passed #88547
build fedora x86_64

00:03:34

 
  Test
passed #88548
check fedora

00:04:33

 
  Full Builds
passed #88549
build android arm64 api28

00:04:28

passed #88551
build cerbero cross win32

00:09:00

passed #88552
build cerbero cross win64

00:07:50

passed #88550
build cerbero fedora x86_64

00:06:44