Optimize test data generation methods

[sandreae]

The methods for generation test data which were imported from p2panda_rs used methods from the api module to publish data to a test node. These methods include validation and retrieving next args (both bring extra db queries) which aren't required when generating test data. This PR refactors the test methods populate_node and populate_and_materialize to generate test data in a more performant manner.

I took the opportunity to make one more change to the test generation api which is that a vec of key pairs is passed in manually to be used for generating the test data. Previously these were generated internally.

📋 Checklist

• Add tests that cover your changes
• Add this PR to the Unreleased section in CHANGELOG.md
• Link this PR to any issues it closes
• New files contain a SPDX license header

[codecov]

Codecov Report

Patch coverage: 96.00% and no project coverage change.

Comparison is base (27c5069) 92.40% compared to head (7fee3dd) 92.41%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #572    +/-   ##
========================================
  Coverage   92.40%   92.41%            
========================================
  Files         106      106            
  Lines       18062    18164   +102     
========================================
+ Hits        16691    16787    +96     
- Misses       1371     1377     +6     

Files Changed	Coverage Δ
aquadoggo/src/test_utils/node.rs	94.64% <91.03%> (-0.61%)	⬇️
aquadoggo/src/db/stores/blob.rs	98.18% <100.00%> (ø)
aquadoggo/src/db/stores/document.rs	98.73% <100.00%> (+0.19%)	⬆️
aquadoggo/src/db/stores/entry.rs	99.13% <100.00%> (+0.01%)	⬆️
aquadoggo/src/db/stores/operation.rs	89.63% <100.00%> (ø)
aquadoggo/src/db/stores/query.rs	96.13% <100.00%> (ø)
aquadoggo/src/db/stores/schema.rs	98.37% <100.00%> (ø)
aquadoggo/src/graphql/mutations/publish.rs	98.71% <100.00%> (+<0.01%)	⬆️
aquadoggo/src/graphql/queries/next_args.rs	96.95% <100.00%> (-0.06%)	⬇️
aquadoggo/src/materializer/service.rs	94.78% <100.00%> (ø)
... and 6 more

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