S3 buckets support object versioning to prevent unexpected changes,
but Nix previously lacked the ability to fetch specific versions of
S3 objects. This adds support for a `versionId` query parameter in S3
URLs, enabling users to pin to specific object versions:
```
s3://bucket/key?region=us-east-1&versionId=abc123
```
Adds a comprehensive test to verify that `nix-prefetch-url` correctly
handles S3 URLs with query parameters (e.g., custom endpoints and regions).
Previously, nix-prefetch-url would fail with "invalid store
path" errors when given S3 URLs with query parameters like
`?endpoint=http://server:9000®ion=eu-west-1`, because it incorrectly
extracted the filename from the query parameters instead of the path.
Add `test_public_bucket_operations` to validate that store operations
work correctly on public S3 buckets without requiring credentials.
Tests nix store info and nix copy operations.
Add cleanup of client store in the finally block of setup_s3 decorator.
Uses `nix store delete --ignore-liveness` to properly handle GC roots
and only attempts deletion if the path exists.
This commit replaces the AWS C++ SDK with a lighter curl-based approach
for S3 binary cache operations.
- Removed dependency on the heavy aws-cpp-sdk-s3 and aws-cpp-sdk-transfer
- Added lightweight aws-crt-cpp for credential resolution only
- Leverages curl's native AWS SigV4 authentication (requires curl >= 7.75.0)
- S3BinaryCacheStore now delegates to HttpBinaryCacheStore
- Function s3ToHttpsUrl converts ParsedS3URL to ParsedURL
- Multipart uploads are no longer supported (may be reimplemented later)
- Build now requires curl >= 7.75.0 for AWS SigV4 support
Fixes: #13084, #12671, #11748, #12403, #5947
