Rollup merge of #122811 - nnethercote:mv-SourceMap-init, r=WaffleLapkin

Move `SourceMap` initialization
So it happens at the same time as `SessionGlobals` initialization, rather than shortly afterward.
r? `@WaffleLapkin`

Author: GuillaumeGomez

clippy_lints/src/doc/needless_doctest_main.rs

@@ -38,7 +38,7 @@ pub fn check(
 // of all `#[test]` attributes in not ignored code examples
 fncheck_code_sample(code:String,edition:Edition,ignore:bool) -> (bool,Vec<Range<usize>>){
  rustc_driver::catch_fatal_errors(|| {
- rustc_span::create_session_globals_then(edition, || {
+ rustc_span::create_session_globals_then(edition,None,|| {
 letmut test_attr_spans = vec![];
 let filename = FileName::anon_source_code(&code);