Remove dependabot attribution and generate changelog sections using `CL-*` labels (#8386)
Remove dependabot attribution and generate changelog sections using `CL-*` labels (#8386)

* Remove dependabot attribution from change log.
* Create sections in generated change log using the `CL-*` labels.
TravisEz13/PowerShell,PaulHigin/PowerShell,TravisEz13/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,TravisEz13/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,JamesWTruher/PowerShell-1,PaulHigin/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell