symblib: support Go 1.26

[florianl]

Similar to #1032 fall back to use .text address if the field text_start is 0.

[florianl]

CI will be fixed with #1036.

An alternative approach to #1036 would be updating the Rust version. Currently, the project uses 1.77.2. The dependency requires 1.82 and at the moment the current stable version is 1.92.

I'm not sure, why this issue was not detected by CI earlier.

[athre0z]

LGTM, ty! For the CI issue, I'd recommend to just update the Rust toolchain.

I'm not sure, why this issue was not detected by CI earlier.

That's weird indeed -- would've expected it to show up during e.g. #1008. 🤔

[florianl]

[..] I'd recommend to just update the Rust toolchain.

I agree with that. #1036 is just a fast way forward to unblock this PR.
Updating the Rust toolchain will be a multiple step process - update Cargo, update build Dockerfile, use new Dockerfile and maybe other steps along the way.

Opened #1038 to update the toolchain.