Auto merge of #108148 - parthopdas:master, r=oli-obk

Implementing "<test_binary> --list --format json" for use by IDE test explorers / runners

Fixes #107307

PR 1 of 2 - wiring up just the new information + implement the command line changes i.e. --format json + tests

upcoming:
PR 2 of 2 - clean up "#[cfg(not(bootstrap))]" from PR 1

As per the discussions on
- MCP: https://rust-lang.zulipchat.com/#narrow/stream/233931-t-compiler.2Fmajor-changes/topic/Implementing.20.22.3Ctest_binary.3E.20--list.20--form.E2.80.A6.20compiler-team.23592/near/328747548
- preRFC: https://internals.rust-lang.org/t/pre-rfc-implementing-test-binary-list-format-json-for-use-by-ide-test-explorers-runners/18308
- FYI on Discord: https://discord.com/channels/442252698964721669/459149169546887178/1075581549409484820

src/librustdoc/doctest.rs

@@ -1057,6 +1057,16 @@ impl Tester for Collector {
                     Ignore::Some(ref ignores) => ignores.iter().any(|s| target_str.contains(s)),
                 },
                 ignore_message: None,
+                #[cfg(not(bootstrap))]
+                source_file: "",
+                #[cfg(not(bootstrap))]
+                start_line: 0,
+                #[cfg(not(bootstrap))]
+                start_col: 0,
+                #[cfg(not(bootstrap))]
+                end_line: 0,
+                #[cfg(not(bootstrap))]
+                end_col: 0,
                 // compiler failures are test failures
                 should_panic: test::ShouldPanic::No,
                 compile_fail: config.compile_fail,

src/tools/compiletest/src/header.rs

@@ -1047,6 +1047,16 @@ pub fn make_test_description<R: Read>(
         name,
         ignore,
         ignore_message,
+        #[cfg(not(bootstrap))]
+        source_file: "",
+        #[cfg(not(bootstrap))]
+        start_line: 0,
+        #[cfg(not(bootstrap))]
+        start_col: 0,
+        #[cfg(not(bootstrap))]
+        end_line: 0,
+        #[cfg(not(bootstrap))]
+        end_col: 0,
         should_panic,
         compile_fail: false,
         no_run: false,