feat(template): sync templates when syncing substates

[ksrichard]

Description

Synchronizing when a VN is just added to the network or syncing new substates. We try to fetch template binary from its owning committee to make our chance higher to get it.
There is also a logic put to periodically check for pending templates, so if we know that we must have a template ready, just try to fetch again from other VNs.

Motivation and Context

When new nodes are joining the network, they did not have the template binaries as so we needed synchronization.

How Has This Been Tested?

1. Start a local swarm with X VNs
2. Publishing a new template (via CLI is simpler)
3. Adding a new VN (or more)
4. Mine to next epoch to make VN(s) available
5. See if new VN(s) have the new template already registered

What process can a PR reviewer use to test or verify this change?

Breaking Changes

• None
• Requires data directory to be deleted
• Other - Please specify

[github-actions]

Test Results (CI)

585 tests  +585   585 ✅ +585   1h 25m 27s ⏱️ + 1h 25m 27s
 54 suites + 54     0 💤 ±  0 
  1 files   ±  0     0 ❌ ±  0 

Results for commit 1b89ea6. ± Comparison against base commit 953b976.

♻️ This comment has been updated with latest results.