Page keeps reloading when loading trace from localhost URL

[s7tya]

As I mentioned in rust-lang/rustc-perf#1967 (comment), the page keeps reloading when trying to load a trace from a localhost URL. This only happens when isLocalhostTraceUrl is set to true.

Although this is a bit of an edge case because we’re modifying some URLs to allow CSP and embedding Perfetto within a project, I wanted to go ahead and report it anyway.

[LalitMaganti]

Just a note to others: I looked at this issue, I think we should add some additional metadata to the open_trace_in_ui flow to distinguish these traces from other POSTs from localhost.