Add Block Origin to BlockData

[kishansagathiya]

Issue summary

We are not supposed to report equivocation if they happen during initial sync, because they could be stale.

To check if we are in initial sync, we need something like block origin. Block origin tells about where did we import this block. It could be things like we got it in the initial sync, was broadcasted in the network, genesis block, got it from a file, etc.
The best place to add that would be in BlockData (

gossamer/dot/types/block_data.go

Line 15 in 8320a2d

type BlockData struct {

). Going through our codebase, we don't have logic to find. We need to add that logic and populate block data with block origin.

Once we have support for block origins, we can just add a condition such that if block origin is initial sync don't report equivocation.

Other information and links

• More context here feat(lib/babe): Submit BABE equivocation report  #2947 (comment)
  Block Origin in substrate
• https://github.com/paritytech/substrate/blob/86c6bb9614c437b63f3dbd2afddef52f32af7866/primitives/consensus/common/src/lib.rs#L62-L63

[timwu20]

@EclesioMeloJunior can you create an epic to house block importing improvements.

[EclesioMeloJunior]

Closing this issue in favor of #4208