Fix total lp value in portfolio

[ryangoree]

Fixes the total LP value in the portfolio for tokens with less than 18 decimals.

Fiat prices are always returned with the default decimals (18):

hyperdrive-frontend/packages/hyperdrive-appconfig/src/tokens/priceOracles/defillama.ts

Lines 30 to 31 in 4ea34c0

	const price = data?.coins?.[defiLlamaTokenId]?.price;
	return parseFixed(price).bigint;

But we were using the base token decimals when using it to determine price:

hyperdrive-frontend/apps/hyperdrive-trading/src/ui/portfolio/lp/LpAndWithdrawalSharesTable/TotalLpValue.tsx

Lines 55 to 58 in 4ea34c0

	? fixed(totalOpenLpPositions ?? 0n, baseToken.decimals).mul(
	fiatPrice,
	baseToken.decimals,
	).bigint

This was inflating the value for USDC pools:

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Latest commit: 3210983

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