Disable ccache on Ubuntu CI job

[kunaltyagi]

Iterating on the Max Compiler Cache size

[SergioRAgostinho]

Seem like it solved the problem. Do you need to revert back to the original key before merging?

[kunaltyagi]

Seem like it solved the problem

No. It didn't solve the problem. It reduced memory usage but with large compile times. I've gutted out the ccache 😢 for now.

revert back to the original key before merging

I'd have needed to. But no need now

[SergioRAgostinho]

I would say we merge this as is to get our CI back to a green state. Integrating/tweaking ccache inside the ubuntu job can come later.

[kunaltyagi]

The issue with tweaking is that the cache issues are hard to find out with CI. Local experiments don't match CI and dummy CI setup (like the commit which added ccache for CI) don't really imply a stable behavior in future. I'd drop this for now for CI

[SergioRAgostinho]

👍 No opposition from my side.

[taketwo]

It's a pity, but indeed green CI is better than fast CI.