Fix benchmark runner bug introduced in release 0.652

[vrn-sn]

Problem

In release 0.652, RequireResolver was refactored to add support for luau-analyze.

As part of this update, RuntimeRequireContext introduced a new convention where a file's chunkname must be prefixed with @ (e.g., @./some/path.luau). This change applies to all chunknames generated within RuntimeRequireContext. However, when a .luau file is executed directly from the command line (e.g., luau ./my/script.luau), the chunkname is still generated with the old = prefix (e.g., =./some/path.luau).

Since RuntimeRequireContext no longer recognizes chunknames prefixed with =, any attempt to directly execute a .luau file from the command line fails. For example, running luau ./my/script.luau results in an error stating that the context is unsupported. This issue also affects tools like the benchmark runner, which rely on direct file execution.

Solution

Update runFile to replace the = prefix in generated chunknames with @.

[zeux]

Thanks!