db: remove all use of "insights" tables

[conorsch]

The "insights" tables are deprecated, and we'd like to remove them from pindexer altogether, but the tokenomics dashboard currently depends on them:

tokenomics/src/lib/db/pindexer/database-mappings.ts

Lines 9 to 21 in 0ccd998

	export const DATA_SOURCES = {
	// Primary supply data
	INSIGHTS_SUPPLY: {
	name: "insights_supply",
	fields: {
	TOTAL_SUPPLY: "total",
	STAKED_SUPPLY: "staked",
	MARKET_CAP: "market_cap",
	PRICE: "price",
	PRICE_NUMERAIRE_ASSET_ID: "price_numeraire_asset_id",
	HEIGHT: "height",
	},
	},

See related discussion in penumbra-zone/penumbra#5208 (comment) & https://github.com/penumbra-zone/penumbra/pull/5232/files