[SandboxIR] Pass registry (#108084)

This patch implements a simple Pass Registry class, which takes
ownership of the passes registered with it and provides an interface to
get the pass pointer by

[SandboxIR] Pass registry (#108084)

This patch implements a simple Pass Registry class, which takes
ownership of the passes registered with it and provides an interface to
get the pass pointer by its name.

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[SandboxVec] Implement Pass class (#107617)

This patch implements the Pass base class and the FunctionPass sub-class
that operate on Sandbox IR.