RFR: 8043: Upgrading D3 from v6 to v7

[Virag Purnam]

D3 has been upgraded from v6 to v7.
Lots of bugfixes and enhancements have been done in v7. Upgrading to v7 will keep JMC up to date with respect to third parties.
https://github.com/d3/d3/blob/main/CHANGES.md

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Commit messages:
 - 8043: Upgrading D3 from v6 to v7
 - 8043: Upgrading D3 from v6 to v7

Changes: https://git.openjdk.org/jmc/pull/470/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=470&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8043
  Stats: 741 lines in 9 files changed: 531 ins; 84 del; 126 mod
  Patch: https://git.openjdk.org/jmc/pull/470.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/470/head:pull/470

PR: https://git.openjdk.org/jmc/pull/470