gles: fix crash when holding multiple devices on wayland/surfaceless. #5351
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Connections
Closes #5349
Description
See #5349 for the crash.
Unfortunately the global state of EGL forces us to do our own global state for reference counting the displays.
Testing
Added a test that crashed before and passes now.
Checklist
cargo fmt
.cargo clippy
.cargo xtask test
to run tests.CHANGELOG.md
. See simple instructions inside file.