Auspice 2.53.0

• Add a download-JSON button within the downloads modal. This is disabled for GISAID sourced data. (#1764)
• Add link-outs to load the current dataset in external platforms MicrobeTrace and Taxonium. Note this functionality only works when Auspice is running within the larger nextstrain.org server. (#1763)

Internal changes.

• Use Nextstrain CLI to create PRs on other repos. (#1765)
• Create PRs on projects which depend on Auspice by adding a label (#1767 and #1768)