netdeploy: allow simple local net topologies

[algorandskiy]

Summary

Changes to netdeploy to control local net topologies. Motivation is allow some networking tests on a local machine without spinning up a cluster.

Implementation Notes:

1. Added PeerList property into local net templates
2. Replaced TemplateFile with actual Template in deployed template network.json since the former was not used.
3. Supported PeerList in network template start (goal network -r xxx start)

Test Plan

Added some unit test. Tested manually with FiveNodesTwoRelays.json templates that forces NPN to connect a single relay, and one of part nodes to connect to another single relay.

$ ps | grep algod
30090 ttys001    0:02.75 ~/go/bin/algod -d ~/networks/five-test/Relay1
30091 ttys001    0:02.91 ~/go/bin/algod -d ~/networks/five-test/Relay2 -p http://127.0.0.1:63606
30092 ttys001    0:02.90 ~/go/bin/algod -d ~/networks/five-test/NonPartNode -p http://127.0.0.1:63606
30093 ttys001    0:04.83 ~/go/bin/algod -d ~/networks/five-test/PartNode1 -p http://127.0.0.1:63606;http://127.0.0.1:63608
30094 ttys001    0:04.91 ~/go/bin/algod -d ~/networks/five-test/PartNode2 -p http://127.0.0.1:63608

NonPartNode connects only R1, PartNode1 connects to both, and PartNode2 connects only to R2 as the templates specifies:

        {
            "Name": "PartNode1",
            "Wallets": [{
                "Name": "LargeWallet",
                "ParticipationOnly": true
            }],
            "PeerList": "Relay1;Relay2"
        },
        {
            "Name": "PartNode2",
            "Wallets": [{
                "Name": "SmallWallet",
                "ParticipationOnly": true
            }],
            "PeerList": "Relay2"
        },
        {
            "Name": "NonPartNode",
            "PeerList": "Relay1"
        }

[codecov]

Codecov Report

Merging #5612 (f70c373) into master (670010a) will decrease coverage by 0.05%.
Report is 1 commits behind head on master.
The diff coverage is 8.00%.

@@            Coverage Diff             @@
##           master    #5612      +/-   ##
==========================================
- Coverage   54.99%   54.94%   -0.05%     
==========================================
  Files         460      460              
  Lines       64439    64450      +11     
==========================================
- Hits        35436    35413      -23     
- Misses      26637    26665      +28     
- Partials     2366     2372       +6     

Files Changed	Coverage Δ
netdeploy/network.go	9.29% <0.00%> (-0.33%)	⬇️
netdeploy/remote/nodeConfig.go	0.00% <ø> (ø)
netdeploy/networkTemplate.go	43.12% <100.00%> (+0.71%)	⬆️

... and 14 files with indirect coverage changes

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[winder]

LGTM

[AlgoAxel]

I am trying to figure out why PeerList is treated as a semicolon delimited string instead of as a []string. But this does indeed work, and I am assuming there's a serialization need, so 👍