[BACKPORT/21.2.x] Multiple dependency updates and fixes

[kostko]

Backports the following:

• go: bump github.com/dgraph-io/badger/v3 from 3.2011.1 to 3.2103.0 in /go #4003
• runtime/core/common/bytes: impl Copy on bytes types #4022
• go: Bump the dynlib import #4026
• runtime: Stop using webpki to verify the IAS cert chain #4021

[codecov]

Codecov Report

Merging #4029 (7f81d9f) into stable/21.2.x (d49922f) will increase coverage by 0.17%.
The diff coverage is n/a.

@@                Coverage Diff                @@
##           stable/21.2.x    #4029      +/-   ##
=================================================
+ Coverage          66.89%   67.07%   +0.17%     
=================================================
  Files                412      412              
  Lines              42306    42306              
=================================================
+ Hits               28301    28375      +74     
+ Misses              9993     9941      -52     
+ Partials            4012     3990      -22     

Impacted Files	Coverage Δ
go/ias/proxy/client/client.go	60.31% <0.00%> (-6.35%)	⬇️
go/ias/api/grpc.go	65.95% <0.00%> (-4.26%)	⬇️
...consensus/tendermint/apps/roothash/transactions.go	66.19% <0.00%> (-3.34%)	⬇️
go/runtime/host/protocol/connection.go	62.99% <0.00%> (-0.79%)	⬇️
...o/consensus/tendermint/apps/beacon/backend_pvss.go	59.56% <0.00%> (-0.44%)	⬇️
go/worker/compute/executor/committee/node.go	69.62% <0.00%> (-0.11%)	⬇️
go/runtime/host/sgx/sgx.go	71.42% <0.00%> (ø)
go/runtime/host/sandbox/sandbox.go	81.00% <0.00%> (ø)
go/consensus/tendermint/apps/beacon/state/state.go	71.42% <0.00%> (ø)
go/storage/mkvs/db/badger/badger.go	67.81% <0.00%> (+0.36%)	⬆️
... and 21 more

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