feat(nano): change ctx.address to ctx.caller_id and add support in NC types

[glevco]

Motivation

The ctx.address attribute can contain either an Address or a ContractId, but those types are not interchangeable and it makes it hard for blueprint devs to handle them. This PR changes it to ctx.caller_id, with added support for storing the CallerId type and sending it through methods across contracts.

Acceptance Criteria

• Change Change.address to Context.caller_id, and add methods get_caller_address and get_caller_contract_id.
• Add support for specific union types on NC fields.
  • Add support for CallerId = Address | ContractId.

[github-actions]

Bencher Report

Branch	feat/nano/caller-id
Testbed	ubuntu-22.04

🚨 1 Alert

Benchmark	Measure Units	View	Benchmark Result (Result Δ%)	Upper Boundary (Limit %)
sync-v2 (up to 20000 blocks)	Latency minutes (m)	📈 plot 🚷 threshold 🚨 alert (🔔)	1.84 m (+11.30%) Baseline: 1.65 m	1.82 m (101.18%)

Click to view all benchmark results

Benchmark	Latency	Benchmark Result minutes (m) (Result Δ%)	Lower Boundary minutes (m) (Limit %)	Upper Boundary minutes (m) (Limit %)
sync-v2 (up to 20000 blocks)	📈 view plot 🚷 view threshold 🚨 view alert (🔔)	1.84 m (+11.30%) Baseline: 1.65 m	1.49 m (80.86%)	1.82 m (101.18%)

🐰 View full continuous benchmarking report in Bencher

[codecov]

Codecov Report

❌ Patch coverage is 77.86885% with 27 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.65%. Comparing base (1aa9b2f) to head (fc6b281).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
hathor/nanocontracts/nc_types/caller_id_nc_type.py	72.88%	9 Missing and 7 partials ⚠️
hathor/nanocontracts/context.py	65.21%	5 Missing and 3 partials ⚠️
...athor/serialization/compound_encoding/caller_id.py	88.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1359      +/-   ##
==========================================
- Coverage   85.65%   85.65%   -0.01%     
==========================================
  Files         427      429       +2     
  Lines       32312    32422     +110     
  Branches     5035     5063      +28     
==========================================
+ Hits        27678    27772      +94     
- Misses       3616     3623       +7     
- Partials     1018     1027       +9     

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