fix(storage): restore TLS for opendal GCS backend after 0.55→0.56 bump

opendal 0.56 moved from reqwest 0.12 to reqwest 0.13. Because quickwit's
workspace uses reqwest 0.12, Cargo no longer unifies features across the
two separate majors. With `default-features = false`, opendal's reqwest
0.13 had no TLS backend, causing every GCS request to fail with:

  invalid URL, scheme is not http

Explicitly enable `reqwest-rustls-tls` (an opendal default feature) so
opendal's reqwest 0.13 is compiled with rustls regardless of the workspace
reqwest version.

Fixes #6477

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: fmassot

quickwit/Cargo.lock

@@ -362,7 +362,7 @@ azure_storage_blobs = { version = "0.21", default-features = false, features = [
   "enable_reqwest_rustls",
 ] }
 
-opendal = { version = "0.56", default-features = false }
+opendal = { version = "0.56", default-features = false, features = ["reqwest-rustls-tls"] }
 reqsign = { version = "0.18", default-features = false, features = ["google", "default-context"] }
 
 quickwit-actors = { path = "quickwit-actors" }