[WIP] Revert self-sampling

[hasyimibhar]

This PR experiments with the disabling of self-sampling of block by each node, which was introduced in PR #428. This is done as part of an effort to debug why the consensus is stalling under local benchmark with K=2 and N > 3.

You can find the debug dump for a sample run here:
node1.txt
node2.txt
node3.txt
node4.txt

[AhmadMuzakkir]

This PR still stalls on my local.

My testing stalled at block 145.
I tested 4 nodes, k = 2, with database.

Below are the commands I used to run the nodes.

go run -tags=debug . -port 3000 -api.port 9000 -wallet config/wallet.txt -db /private/tmp/wavelet/node1 -loglevel debug -sys.snowball.k 2 |& tee ~/Desktop/443/node1.tx

go run . -port 3001 -api.port 9001 -wallet config/wallet2.txt -db /private/tmp/wavelet/node2 -loglevel debug -sys.snowball.k 2 127.0.0.1:3000 |& tee ~/Desktop/443/node2.txt 127.0.0.1:3000

go run -tags=debug . -port 3002 -api.port 9002 -wallet config/wallet3.txt -db /private/tmp/wavelet/node3 -loglevel debug -sys.snowball.k 2 127.0.0.1:3000 |& tee ~/Desktop/443/node3.txt 127.0.0.1:3000

go run -tags=debug . -port 3003 -api.port 9003 -db /private/tmp/wavelet/node4 -loglevel debug -sys.snowball.k 2 127.0.0.1:3000 |& tee ~/Desktop/443/node4.txt

Note: I forgot to put tags=debug on Node 2.

For some reason I could not upload CLI dumps to this PR.

I put them in https://drive.google.com/drive/folders/1GHHM-bN4LwPm3QrNQBn-yslTAEVD6ns5?usp=sharing