Add Ubuntu 21.04 Hirsute Hippo

[callahad]

Heads up: this also drops i386 from the Architectures line of the distributions file for this distro.

I don't see any artifacts that aren't amd_64 in our pool, so I'd expect it to be fine.

Signed-off-by: Dan Callahan [email protected]

[erikjohnston]

I don't see any artifacts that aren't amd_64 in our pool, so I'd expect it to be fine.

Hmm, slightly odd since our pacakges should be architecture independent? But I think you're right that we don't build matrix-synapse-py3 for i386, though looks like we might have done for matrix-synapse`?

[richvdh]

lgtm

[richvdh]

Hmm, slightly odd since our pacakges should be architecture independent?

No, they have binaries in.

[callahad]

Hmm, slightly odd since our pacakges should be architecture independent?

No, they have binaries in.

Specifically, any binary wheels we depend on (psycopg2, cryptography, etc.)