hotfix: use current circulating STX tokens for `stx_supply` endpoint #2500

Job	Run time
lint	1m 8s
test	9m 53s
test-event-replay	1m 36s
test-2_5 (block-zero-handling)	1m 30s
test-bns	3m 1s
test-2_5 (faucet-stx)	1m 29s
test-bns-e2e	3m 21s
test-2_5 (pox-4-btc-address-formats)	2m 6s
test-btc-faucet	1m 13s
test-rosetta	3m 8s
test-2_5 (pox-4-delegate-aggregation)	2m 20s
test-rpc	1m 16s
test-2_5 (pox-4-delegate-stacking)	1m 43s
test-2_5 (pox-4-delegate-revoked-stacking)	1m 59s
test-2_5 (pox-4-stack-extend-increase)	3m 19s
build-publish	2m 22s
test-2_5 (pox-4-rosetta-btc-addr-types)	5m 6s
test-2_5 (pox-4-rosetta-cycle-phases)	1m 28s
test-2_5 (pox-4-rosetta-segwit)	1m 54s
test-rosetta-cli-construction	2m 21s
test-2_5 (pox-4-burnchain-stack-stx)	1m 46s
test-2_5 (pox-4-burnchain-delegate-stx)	1m 29s
test-rosetta-cli-data	2m 4s
test-rosetta-construction	2m 11s
	59m 43s

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