Prepare Parse Server 8 release

[mtrezza]

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Issue Description

Task list for release of Parse Server 8.

Tasks

Common

• [ ] Remove support for Node versions that have reached their EOL
• [ ] Remove support for Postgres / PostGIS versions that have reached their EOL
• [ ] Remove support for MongoDB versions that have reached their EOL
• [ ] Update package-lock engines.node
  • Specify the exact node version, not just the major version, and use latest Node version, e.g. instead of >=18 <19 || >=20 <21 use >=18.2.3 <19 || >=20.2.3 <21
• [ ] Remove deprecated Parse Server options
• [ ] Update Snyk branches to monitor
  • Remove current LTS branch, add new LTS branch.
• [ ] Update .releaserc.js to new LTS branch

Specific

• [ ] https://github.com/parse-community/parse-server/pull/9103 (only close, no merge)
• [ ] https://github.com/parse-community/parse-server/pull/9342

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[mtrezza]

@parse-community/server Please feel free to comment for any other things that should be included in the Parse Server 8 release, specially regarding PRs with breaking changes.