snapcaft.yaml: Set the AppStream ID in the Snap metadata
snapcaft.yaml: Set the AppStream ID in the Snap metadata

This allows software store to recognise this snap matches Visual Studio Code in
other formats (.deb, .rpm, Flatpak etc). It also means reviews on ODRS are
grouped together.

mjbvz/vscode,hoovercj/vscode,Microsoft/vscode,the-ress/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,the-ress/vscode,microsoft/vscode,Microsoft/vscode,microsoft/vscode,joaomoreno/vscode,eamodio/vscode,microsoft/vscode,hoovercj/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,Microsoft/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,mjbvz/vscode,the-ress/vscode,Microsoft/vscode,mjbvz/vscode,mjbvz/vscode,mjbvz/vscode,mjbvz/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,the-ress/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,the-ress/vscode,microsoft/vscode,mjbvz/vscode,the-ress/vscode,microsoft/vscode,hoovercj/vscode,mjbvz/vscode,Krzysztof-Cieslak/vscode,joaomoreno/vscode,the-ress/vscode,joaomoreno/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,eamodio/vscode,hoovercj/vscode,Microsoft/vscode,mjbvz/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,microsoft/vscode,joaomoreno/vscode,mjbvz/vscode,mjbvz/vscode,microsoft/vscode,hoovercj/vscode,joaomoreno/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,the-ress/vscode,joaomoreno/vscode,hoovercj/vscode,the-ress/vscode,hoovercj/vscode,mjbvz/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,joaomoreno/vscode,hoovercj/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,hoovercj/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,hoovercj/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,joaomoreno/vscode,the-ress/vscode,joaomoreno/vscode,mjbvz/vscode,joaomoreno/vscode,mjbvz/vscode,Microsoft/vscode,the-ress/vscode,microsoft/vscode,the-ress/vscode,mjbvz/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,microsoft/vscode,joaomoreno/vscode,microsoft/vscode,joaomoreno/vscode,eamodio/vscode,hoovercj/vscode,Microsoft/vscode,joaomoreno/vscode,microsoft/vscode,eamodio/vscode,the-ress/vscode,joaomoreno/vscode,eamodio/vscode,Microsoft/vscode,mjbvz/vscode,microsoft/vscode,joaomoreno/vscode,hoovercj/vscode,Microsoft/vscode,microsoft/vscode,joaomoreno/vscode,eamodio/vscode,hoovercj/vscode,hoovercj/vscode,joaomoreno/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,eamodio/vscode,mjbvz/vscode,hoovercj/vscode,eamodio/vscode