tracking issue upstream forks

[twuebi]

We're currently depending on a number of forks, namely:

iceberg-rust -> opendal -> reqsign
needs_env_var

We should start to depend on the upstream repos as soon as possible, the conditions for this are:

• reqsign: needs to release
• opendal: needs to bump its version to the reqsign release
• opendal: needs to release
• iceberg-rust: we need to upstream our diffs
  • view metadata builder
  • table metadata builder / partition binder PR TableMetadataBuilder & PartitionBinder & ViewMetadataBuilder to iceberg-rust #46
  • rustls
  • Type-safe(r) properties #237
  • FileIO: remove_all
  • FileIO: list_all
• needs env var now optionally considers content of an env variable HerrMuellerluedenscheid/needs_env_var#2 chore(deps): use upstream needs-env-var #338