chore: Add tests for `TrieAccount` #227

Job	Run time
clippy	23s
docs	15s
feature-checks	19s
fmt	11s
miri --no-default-features	4m 38s
test stable --no-default-features	20s
miri	34s
test stable	16s
miri --all-features	49s
test stable --all-features	44s
test beta --no-default-features	22s
test beta	17s
test beta --all-features	48s
test nightly --no-default-features	25s
test nightly	22s
test nightly --all-features	41s
test 1.81 --no-default-features	12s
test 1.81	15s
test 1.81 --all-features	26s
	12m 17s

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