tests: ignore shout2send in the state change tests

sink->conn is leaked racily, cannot reproduce locally, only
on the CI
15 jobs for ignore_shout2send in 73 minutes and 24 seconds (queued for 28 seconds)
latest
Status Job ID Name Coverage
  Preparation
passed #301453
gst indent

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passed #301452
manifest

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  Build
passed #301454
build fedora x86_64

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passed #301455
build nodebug fedora x86_64

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  Test
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check fedora

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passed #301457
integration testsuites fedora

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  Full Builds
passed #301459
build cerbero android universal

00:14:50

passed #301460
build cerbero cross win32

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passed #301461
build cerbero cross win64

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passed #301458
build cerbero fedora x86_64

00:06:58

 
  Full Tests
passed #301463
valgrind bad

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passed #301464
valgrind ges

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passed #301462
valgrind good

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  Apps
passed #301465
android universal examples

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  Deploy
passed #301466
documentation

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