hotfix: use current circulating STX tokens for stx_supply endpoint

[zone117x]

See https://www.notion.so/hiropbc/Total-supply-endpoint-af38665d46184408b681e05bbaf1eda0

Use current total STX supply for total_stx field in /extended/v1/stx_supply endpoint, rather than the year 2050 estimate. The year 2050 estimated is specified in a new field.

Example old response:

{
  "unlocked_percent": "82.00",
  "total_stx": "1818000000.000000",
  "unlocked_stx": "1490741806.960600",
  "block_height": 167439
}

Example new response:

{
  "unlocked_percent": "100.00",
  "total_stx": "1490741806.960600",
  "total_stx_year_2050": "1818000000.000000",
  "unlocked_stx": "1490741806.960600",
  "block_height": 167439
}

Deprecate a few old/unused endpoints:

• https://docs.hiro.so/stacks/api/info/legacy-total-and-unlocked-stx-supply
• https://docs.hiro.so/stacks/api/info/total-stx-supply-in-plain-text
• https://docs.hiro.so/stacks/api/info/circulating-stx-supply-in-plain-text

[github-actions]

Vercel deployment URL: https://stacks-blockchain-9rfx0vpri-hirosystems.vercel.app 🚀

[rafaelcr]

LGTM

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/api/routes/ws/channels/socket-io-channel.ts	50.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[diwakergupta]

minor comments, otherwise LGTM (pending any testing)

[blockstack-devops]

🎉 This PR is included in version 8.0.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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