Disable 13.0.X to 13.0.HeavyIon.X forward porting

[smuzaffar]

No description provided.

[cmsbuild]

A new Pull Request was created by @smuzaffar (Malik Shahzad Muzaffar) for branch master.

@aandvalenzuela, @smuzaffar, @iarspider, @cmsbuild can you please review it and eventually sign? Thanks.
@antoniovilela, @rappoccio, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[smuzaffar]

@cms-sw/orp-l2 , this disables the automatic forward porting from 13.0.X to 13.0.HeavyIon.X. So PR explicitly opened for 13.0.HeavyIon.X will be part of 13.0.HeavyIon.X IBs/Releases

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs after it passes the integration tests. This pull request will now be reviewed by the release team before it's merged. @sextonkennedy, @rappoccio, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)