Revert "Fix source_file bug in mono_ppdb_lookup_location_internal"

[thaystg]

Reverts #96497

[vargaz]

A possible fix would be:

		if (!first && delta_il == 0) {
			/* document-record */
			docidx = mono_metadata_decode_value (ptr, &ptr);
			// check the current iloffset to ensure that we do not update docname after the target
			// offset has been reached (the updated docname will be for the next sequence point)
			if (iloffset < offset)
				docname = get_docname (ppdb, image, docidx);
			continue;
		}

[vargaz]

@bholmes

[thaystg]

Do you think we should fix it for preview 1 or revert it for preview 1 and try this in main?

[vargaz]

I'd suggest reverting it.

[thaystg]

/backport to release/9.0-preview1

[github-actions]

Started backporting to release/9.0-preview1: https://github.com/dotnet/runtime/actions/runs/7620042277

[bholmes]

A possible fix would be:

Yes this looks correct

[thaystg]

@bholmes can you please open another PR with @vargaz suggestion?