Fix getBlocks to not add the anticone when some blocks were filtered by GetHashesBetween

[someone235]

Otherwise there can be a situation you get a block in the anticone without getting its parents first

[codecov]

Codecov Report

Merging #1611 (d3f96a3) into v0.10.0-dev (cbd0bb6) will decrease coverage by 0.00%.
The diff coverage is 45.00%.

@@               Coverage Diff               @@
##           v0.10.0-dev    #1611      +/-   ##
===============================================
- Coverage        60.02%   60.02%   -0.01%     
===============================================
  Files              515      515              
  Lines            20455    20454       -1     
===============================================
- Hits             12279    12278       -1     
+ Misses            6227     6226       -1     
- Partials          1949     1950       +1     

Impacted Files	Coverage Δ
domain/consensus/processes/syncmanager/antipast.go	40.74% <25.00%> (-0.44%)	⬇️
domain/consensus/consensus.go	64.62% <50.00%> (ø)
...rotocol/flows/blockrelay/handle_request_headers.go	68.29% <100.00%> (ø)
app/rpc/rpchandlers/get_blocks.go	32.65% <100.00%> (ø)
...ain/consensus/processes/syncmanager/syncmanager.go	100.00% <100.00%> (ø)
...k/netadapter/server/grpcserver/connection_loops.go	53.84% <0.00%> (-3.85%)	⬇️
app/protocol/flows/blockrelay/handle_relay_invs.go	70.00% <0.00%> (+1.25%)	⬆️

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