runtime: TestGdbAutotmpTypes failures [1.23 backport]

[gopherbot]

@prattmic requested issue #69527 to be considered for backport to the next 1.23 minor release.

@gopherbot Please backport to 1.23 and 1.22. This is a test-only fix due to a change on the builders (new version of GDB). Hence release branches are also flaking.

[gopherbot]

Change https://go.dev/cl/617455 mentions this issue: [release-branch.go1.23] runtime: fix TestGdbAutotmpTypes on gdb version 15

[gopherbot]

Closed by merging CL 617455 (commit f8080ed) to release-branch.go1.23.