Feature: support tagging for writing S3 objects

[dmitsf]

Adds the option to tag S3 objects for writing objects via extendng WriterOptions.

Example:

err = bucket.WriteAll(ctx, someKey, []byte{}, &blob.WriterOptions{
	Tags: map[string]string{
		"foo": "bar",
	},
})

Result:

[dmitsf]

Merging with some tests failed for now because updating the replay files requires generation steps from the library maintainers.