Falcon key gen time: set LastPartKeyRound 3K

[algonautshant]

• remove test param from CreateNetworkFromTemplate

• Do not override template.Genesis.LastPartKeyRound if in test mode or if ALGOTEST env variable is set

• update test templates to explicitly set the LastPartKeyRound to 3k instead of relying on 3M default value.

• Flag to cap last round of participation key generation, and use the flag for testing.

• Enhance notification messages to notify the user the keys are generated.

• Reduce LastPartKeyRound for scenarios 1-3.

[codecov-commenter]

Codecov Report

Merging #3280 (a4f14ec) into feature/dilithium-scheme-integration (ca330c6) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@                           Coverage Diff                            @@
##           feature/dilithium-scheme-integration    #3280      +/-   ##
========================================================================
- Coverage                                 47.84%   47.82%   -0.03%     
========================================================================
  Files                                       381      381              
  Lines                                     61651    61651              
========================================================================
- Hits                                      29496    29483      -13     
- Misses                                    28734    28741       +7     
- Partials                                   3421     3427       +6     

Impacted Files	Coverage Δ
cmd/goal/network.go	16.48% <0.00%> (ø)
gen/generate.go	14.15% <0.00%> (-0.20%)	⬇️
netdeploy/network.go	9.09% <ø> (+0.12%)	⬆️
ledger/roundlru.go	90.56% <0.00%> (-5.67%)	⬇️
ledger/blockqueue.go	82.18% <0.00%> (-2.88%)	⬇️
catchup/peerSelector.go	98.95% <0.00%> (-1.05%)	⬇️
cmd/tealdbg/debugger.go	72.86% <0.00%> (-1.01%)	⬇️
ledger/acctupdates.go	65.01% <0.00%> (-0.96%)	⬇️
network/wsNetwork.go	63.04% <0.00%> (-0.20%)	⬇️
catchup/service.go	69.90% <0.00%> (+0.49%)	⬆️
... and 2 more

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[winder]

LGTM. Is LastPartKeyRound in the template new?