feat(core): Expose presign_xxx_options API

[geruh]

Which issue does this PR close?

related to: #6213

Rationale for this change

This PR extends the functionality introduced in #6215 by exposing presign_xxx_options API methods, allowing users to pass detailed options when generating presigned URLs across all services supporting presign.

What changes are included in this PR?

Users can now specify detailed options when presigning:

let signed_req = op.presign_read_options(
    "file.txt",
    Duration::from_secs(3600),
    ReadOptions {
        override_content_type: Some("application/json".to_string()),
        ..Default::default()
    }
).await?;

During testing, I was adding some tests to ensure that options were being set properly across the services for presigning, and I noticed some of the options aren't being set.

service	Issues Found
S3	Required write options were not being passed to put operations in the backend.
Azure	Options are not passed in. Although, adding them has limited support. Azure requires headers to be embedded during SAS token generation, but reqsign also doesn't support custom headers during SAS generation. This prevents implementing options like cache-control, content-disposition, and conditional headers without upstream reqsign library changes. Also, OpenDAL doesn't leverage reqsign's token generation and requires it to be manually passed in or the capability is disabled. hence, why testing doesn't pick this up.
B2	Options are not passed to presign operations and some headers are hard coded.
COS	Limited write support, but GET/STAT overrides are not handled.
OBS	Limited write support, but GET/STAT overrides are not handled.
OSS	Supports write and some GET/STAT operations, but some fields are hard coded.

Today, the tests with limited support will fail, and it might be better to just omit these tests, keep the same behavior as today, and address each service in a separate PR.

Are there any user-facing changes?

No extending the functionality to be able to pass in options to all presigning operations

Manual testing

S3 passes & Azurite some passes

[Xuanwo]

Thank you @geruh, that's really great work! Would you like to start an issue to track them?

[Xuanwo]

Thank you, really love this change!