Add back `deletability` support for `graph.user/photo` and `graph.group/photo`

[irvinesunday]

Since DELETE is now supported for the above resources... we need to revert some changes made via this PR: #392

• Initial issue: Deleteability should be removed for profilePhoto resource type #387

• DELETE support announcement: Deleteability should be removed for profilePhoto resource type #387 (comment)

• Documentation ref:

Related to: #576

[shemogumbe]

I notice we still have challenge on this, for user photo and group photo

This blocks us on: microsoftgraph/msgraph-sdk-dotnet#2247 across SDKs

The API supports this:

1. updating profile photo
2. deleting profile photo

Reopening this and wishing it is prioritized as it might be a challenge to users once Exchange Online PowerShell UserPhoto cmdlets are deactivated following this

cc @irvinesunday @adhiambovivian @petrhollayms

[irvinesunday]

the conversion lib (Yoko) has never supported DELETE operations for media content paths, like the ones listed above. This might have to be a feature request on Yoko, while also considering that other non graph.profilePhoto /.../$value paths might have the DELETE operations generated as well, unless there exists an appropriate annotation limiting this.

cc: @millicentachieng

[andrueastman]

Resolved by microsoft/OpenAPI.NET.OData#523 and available through the latest version of Hidi.