Bump Alchemy to 2.0.0-beta.84 (package split) and turn off its telemetry #2235

We pin alchemy and @alchemy.run/frontend-frameworks at 2.0.0-beta.77; npm's latest is beta.84. beta.84 splits Cloudflare, AWS, Git, Drizzle and more into @alchemy.run/* packages (release), so the generated imports change (alchemy/Cloudflare in packages/cli/src/gen/alchemy.ts), as do the pins in packages/cli/src/glue/deploy-deps.ts and each app's package.json.

• Bump alone, then run a plan on codeSplitter's stack and check that it replaces nothing.
• Alchemy's CLI telemetry is on by default (privacy). Set DO_NOT_TRACK=1 in the env rustybuns hands alchemy.

Map: notes/ALCHEMY.md (#2234).