Tracking issue of GSP-729: Redesign HTTP Signer

[JinnyYi]

• Rendered RFC

Steps

• Remove HTTPSigner and QuerySignHTTP().
• Add StorageHTTPSigner interface and operations in definitions. definitions: Implement GSP-729 Redesign HTTP Signer #732
• Implement integration test. storage: Implement StorageHTTPSigner test go-integration-test#49
• Update docs in site (Add descriptions for the operaiton and a doc for migration from Reacher to QuerySignHTTPRead). docs: Add docs for StorageHTTPSigner site#191
• Add example Add QuerySignHTTPRead example go-storage-example#21 Add write example go-storage-example#22

[Xuanwo]

Maybe we need to release v4.7.0 before we implement it service side?