Rollup of 12 pull requests

[Kobzol]

Successful merges:

• Don't build ParamEnv and do trait solving in ItemCtxts when lowering IATs #140247 (Don't build ParamEnv and do trait solving in ItemCtxts when lowering IATs)
• Affirm -Cforce-frame-pointers=off does not override #140774 (Affirm -Cforce-frame-pointers=off does not override)
• Stabilize feature(generic_arg_infer) #141610 (Stabilize feature(generic_arg_infer))
• CodeGen: rework Aggregate implemention for rvalue_creates_operand cases #142383 (CodeGen: rework Aggregate implemention for rvalue_creates_operand cases)
• Add spawn APIs for BootstrapCommand to support deferred command execution #142591 (Add spawn APIs for BootstrapCommand to support deferred command execution)
• apply clippy::or_fun_call #142619 (apply clippy::or_fun_call)
• Actually take --build into account in bootstrap #142624 (Actually take --build into account in bootstrap)
• Add StepMetadata to describe steps #142627 (Add StepMetadata to describe steps)
• remove joboet from review rotation #142660 (remove joboet from review rotation)
• Skip tidy triagebot linkcheck if triagebot.toml doesn't exist #142666 (Skip tidy triagebot linkcheck if triagebot.toml doesn't exist)
• Clarify bootstrap tools description #142672 (Clarify bootstrap tools description)
• remove duplicate crash test #142674 (remove duplicate crash test)

Failed merges:

• Add config builder for bootstrap tests #142629 (Add config builder for bootstrap tests)

r? @ghost
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