Modernize/review github actions

[juan-leon]

• Maybe actions/cache can speed up things
• actions-rs/tarpaulin looks not actively maintained ans triggers deprecation notices; look for alternatives (see Plan to deprecate this Action actions-rs/tarpaulin#6)
• Investigate how/if cargo install cargo-deb can simplify Create Debian package build step
• Stop using set-output commands (see https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/)
• Do I need actions-rs/cargo?

[juan-leon]

actions-rs/cargo looks not actively maintained and triggers some deprecation warnings.

I am only using it for making cross compilation easy.

Here is an article about how to do that without using actions to ease the work: https://www.rohanjain.in/cargo-cross/