[AI Codemod][PerfAICT-ObjCpy] perf: Add extra && qualified overloads to RequestBuilder

[MatzeB]

Summary:
This code has been flagged for performance in internal profiles. This is an AI generated improvement that was human reviewed:

Optimized RequestBuilder in HttpClient.h to avoid unnecessary copy construction when chaining builder methods on temporary (rvalue) objects.

Problem: The builder methods (jwtOptions, method, url, header) returned RequestBuilder& (lvalue reference). When chaining on a temporary (e.g., auto rb = RequestBuilder().method(...).url(...);), the final result was an lvalue reference, forcing the implicit copy constructor to be invoked.

Fix: Added &&-qualified (rvalue ref-qualified) overloads of all builder methods. When called on an rvalue RequestBuilder, these overloads return RequestBuilder&&, enabling move construction instead of copy construction at call sites like PrestoExchangeSource::doRequest. The existing &-qualified overloads continue to work identically for lvalue usage. This eliminates the copy of both JwtOptions and proxygen::HTTPMessage members in the common temporary-chaining pattern.

Differential Revision: D107396503

Summary by Sourcery

Enhancements:

• Add &&-qualified overloads for jwtOptions, method, url, and header to support efficient chaining on rvalue RequestBuilder instances while preserving existing lvalue behavior.

[linux-foundation-easycla]

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[sourcery-ai]

Reviewer's Guide

Adds rvalue-reference-qualified overloads to RequestBuilder’s fluent builder methods so that chaining on temporaries returns RequestBuilder&& and avoids unnecessary copies, while preserving existing lvalue behavior.

File-Level Changes

Change	Details	Files
Introduce &&-qualified overloads for RequestBuilder fluent methods to enable move-based chaining on temporaries while keeping existing &-qualified behavior for lvalues.	Ref-qualify existing jwtOptions, method, url, and header overloads with & so they only participate for lvalue RequestBuilder instances Add matching &&-qualified overloads for jwtOptions, method, url, and both header signatures that assign into internal members and return std::move(*this) Maintain existing semantics of setting jwtOptions_, headers_.setMethod, headers_.setURL, and headers_.getHeaders().set while optimizing call sites that chain on temporaries	presto-native-execution/presto_cpp/main/http/HttpClient.h

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[sourcery-ai]

Hey - I've left some high level feedback:

• The new && and & overload pairs all duplicate the same bodies; consider factoring the shared logic into private helper methods (e.g., setJwtOptions, setMethod, setUrl, setHeader) to keep behavior in sync and reduce the chance of divergence when these are modified in the future.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new && and & overload pairs all duplicate the same bodies; consider factoring the shared logic into private helper methods (e.g., `setJwtOptions`, `setMethod`, `setUrl`, `setHeader`) to keep behavior in sync and reduce the chance of divergence when these are modified in the future.

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[steveburnett]

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