[CHIA-3293] Port get_wallets to @marshal decorator

[Quexington]

Another PR following #18593

[coveralls-official]

Pull Request Test Coverage Report for Build 16315677956

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 100 of 103 (97.09%) changed or added relevant lines in 10 files are covered.
• 462 unchanged lines in 41 files lost coverage.
• Overall coverage decreased (-0.06%) to 91.332%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
chia/cmds/wallet_funcs.py	3	6	50.0%

Files with Coverage Reduction	New Missed Lines	%
chia/daemon/keychain_proxy.py	1	73.24%
chia/farmer/farmer.py	1	73.28%
chia/full_node/pending_tx_cache.py	1	96.55%
chia/rpc/rpc_server.py	1	88.24%
chia/_tests/core/mempool/test_mempool_manager.py	1	99.93%
chia/_tests/wallet/cat_wallet/test_trades.py	1	99.8%
chia/wallet/cat_wallet/cat_outer_puzzle.py	1	98.81%
chia/wallet/nft_wallet/metadata_outer_puzzle.py	1	97.14%
chia/wallet/nft_wallet/singleton_outer_puzzle.py	1	98.77%
chia/daemon/client.py	2	74.16%

Totals
Change from base Build 16149582872:	-0.06%
Covered Lines:	102337
Relevant Lines:	111929

---

💛 - Coveralls

[github-actions]

File	Coverage	Missing Lines
chia/wallet/wallet_rpc_api.py	94.1%	lines 1035

Total	Missing	Coverage
120 lines	Unknown	99%