Adding test and fixing price per share function in ERC4626 Data Provider

[gtowle03]

Made all changes based on last reviews

fixes: #437

[github-actions]

Hyperdrive Gas Benchmark

Benchmark suite	Current: 63e09f5	Previous: 5007450	Deviation	Status
addLiquidity: min	785 gas	709 gas	10.7193%	🚨
addLiquidity: avg	43583 gas	45498 gas	-4.2090%	✅
addLiquidity: max	70800 gas	77728 gas	-8.9131%	✅
checkpoint: min	514 gas	514 gas	0%	🟰
checkpoint: avg	23044 gas	23019 gas	0.1086%	🚨
checkpoint: max	33438 gas	33407 gas	0.0928%	🚨
closeLong: min	852 gas	659 gas	29.2868%	🚨
closeLong: avg	45987 gas	47497 gas	-3.1791%	✅
closeLong: max	86074 gas	83240 gas	3.4046%	🚨
closeShort: min	809 gas	616 gas	31.3312%	🚨
closeShort: avg	40931 gas	42330 gas	-3.3050%	✅
closeShort: max	87402 gas	84477 gas	3.4625%	🚨
initialize: min	714 gas	532 gas	34.2105%	🚨
initialize: avg	159493 gas	160281 gas	-0.4916%	✅
initialize: max	233625 gas	161781 gas	44.4082%	🚨
openLong: min	740 gas	661 gas	11.9516%	🚨
openLong: avg	113272 gas	114770 gas	-1.3052%	✅
openLong: max	180018 gas	175911 gas	2.3347%	🚨
openShort: min	782 gas	709 gas	10.2962%	🚨
openShort: avg	151265 gas	159830 gas	-5.3588%	✅
openShort: max	219306 gas	218810 gas	0.2267%	🚨
removeLiquidity: min	762 gas	569 gas	33.9192%	🚨
removeLiquidity: avg	57435 gas	62682 gas	-8.3708%	✅
removeLiquidity: max	119378 gas	116558 gas	2.4194%	🚨

This comment was automatically generated by workflow using github-action-benchmark.

[coveralls]

coverage: 96.509% (+0.3%) from 96.18% when pulling 63e09f5 on gtowle/temp/ppshare-fix into 6d713fe on main.

[jalextowle]

LGTM once the nits are resolved.