Added a pattern matching iterator to the DB

[batconjurer]

Describe your changes

When iterating over key prefixes, we can additionally filter out keys based on a regex.

Indicate on which release or other PRs this topic is based on

Checklist before merging to draft

• I have added a changelog
• Git history is in acceptable state

[codecov]

Codecov Report

Attention: Patch coverage is 30.76923% with 216 lines in your changes are missing coverage. Please review.

Project coverage is 53.82%. Comparing base (cc3edde) to head (1242c11).

Files	Patch %	Lines
crates/apps/src/lib/node/ledger/storage/rocksdb.rs	0.00%	44 Missing ⚠️
crates/governance/src/cli/onchain.rs	0.00%	24 Missing ⚠️
crates/storage/src/mockdb.rs	0.00%	24 Missing ⚠️
crates/macros/src/lib.rs	71.60%	23 Missing ⚠️
crates/proof_of_stake/src/types/mod.rs	0.00%	13 Missing ⚠️
crates/storage/src/types.rs	0.00%	10 Missing ⚠️
crates/governance/src/cli/offline.rs	0.00%	9 Missing ⚠️
crates/apps/src/lib/config/genesis.rs	0.00%	7 Missing ⚠️
crates/core/src/event.rs	0.00%	6 Missing ⚠️
crates/migrations/src/lib.rs	0.00%	5 Missing ⚠️
... and 23 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2839      +/-   ##
==========================================
- Coverage   53.88%   53.82%   -0.06%     
==========================================
  Files         308      309       +1     
  Lines      100154   100393     +239     
==========================================
+ Hits        53967    54036      +69     
- Misses      46187    46357     +170     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.