sarif output: Fix ICE due to overzealous caching [PR124014]

sarif output: Fix ICE due to overzealous caching [PR124014]

PR diagnostics/124014 identifies an ICE in sarif output of
diagnostics that occur after free_lang_data has called
tree_diagnostics_defaults, which happens e.g. with lto.

The issue is that in r16-413-g8ab6899dce92e6 I introduced to sarif_sink
a cached pointer to the logical_locations::manager, which for tree-using
clients is part of the compiler_data_hooks.  Hence for the case above, the
pointer is freed from under the sarif_sink, and any diagnostic
issued after that point with a current_function_decl will
trigger a use-after-free.

Fix by removing the cached pointer.

gcc/ChangeLog:
	PR diagnostics/124014
	* diagnostics/sarif-sink.cc
	(sarif_builder::get_logical_location_manager): Reimplement, to
	eliminate m_logical_loc_mgr.
	(sarif_builder::m_logical_loc_mgr): Drop field.
	(sarif_builder::sarif_builder): Update for removed field.
	(sarif_builder::set_any_logical_locs_arr): Likewise.
	(sarif_builder::ensure_sarif_logical_location_for): Likewise.
	(sarif_builder::make_minimal_sarif_logical_location): Likewise.

gcc/testsuite/ChangeLog:
	PR diagnostics/124014
	* gcc.dg/sarif-output/ice-pr124014.c: New test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>