Issue warning when using deprecated SELFDESTRUCT

[nikola-matic]

Fixes #13844.

[ekpyron]

I mean, ideally we'd change the docs examples as well, s.t. they don't use it :-). But we can make that a separate issue. Apart from that only the inline assembly warning, as discussed.

[nikola-matic]

I mean, ideally we'd change the docs examples as well, s.t. they don't use it :-). But we can make that a separate issue. Apart from that only the inline assembly warning, as discussed.

Do we have a place in the docs where we track deprecated and removed instructions/features and their proposed alternatives, a la boost?

[cameel]

Looks fine to me.