Change the type of `psDeposits` to `CompactForm Coin` #18961

Job	Run time
cabal-format	6s
build (9.10.2, ubuntu-latest)	6m 51s
gen-hie	6m 52s
build (9.6.7, ubuntu-latest)	8m 50s
fourmolu	45s
build (9.12.2, ubuntu-latest)	6m 4s
build (9.8.4, ubuntu-latest)	8m 21s
shellcheck	5s
Check if formal-ledger-specifications SRP is valid	12s
Check branch history	10s
Tests completed	2s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	0s
codegen	0s
Send a slack notification on \#ledger-internal if the nightly build failed	0s
	38m 18s

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