feat: fix genesis block sync and add related tests

[atanmarko]

Description

Fixed subnet sync. It now starts from genesis block 0.
New sequencer regressing test checking sync from genesis block and particular historical block.

Fixes TP-706

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.11% ⚠️

Comparison is base (79c7983) 53.03% compared to head (45515db) 52.93%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #305      +/-   ##
==========================================
- Coverage   53.03%   52.93%   -0.11%     
==========================================
  Files         216      216              
  Lines       10629    10648      +19     
==========================================
- Hits         5637     5636       -1     
- Misses       4992     5012      +20     

Files Changed	Coverage Δ
...pos-sequencer-subnet-client/src/subnet_contract.rs	0.00% <0.00%> (ø)
...opos-sequencer-subnet-runtime/src/certification.rs	0.00% <0.00%> (ø)
crates/topos-sequencer-subnet-runtime/src/proxy.rs	0.00% <0.00%> (ø)
crates/topos-sequencer/src/lib.rs	0.00% <0.00%> (ø)
crates/topos-tce-proxy/src/client.rs	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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[atanmarko]

@hadjiszs I'll merge this one, we need this genesis sync fix for the release. Any other change I'll implement in additional PR

Implemented