fix(irq): prevent interrupt reservation and improve error handling

[Diogo21Costa]

PR Description

This PR enhances the interrupt reservation functions to prevent race conditions during the reservation process. It comprises the following changes:

1. Added a spinlock to ensure synchronized access to the critical section, preventing race conditions. The original code lacked this synchronization, potentially leading to issues. The spinlock now ensures only one thread can access the critical section at a time, resolving the race condition (196a404);
2. Introduced a boolean return value to indicate the success of interrupt reservation. This provides a more detailed assessment of interrupt assignment status, aiding in error handling (fc2029b);
3. Improved the overall error handling for interrupt assignment (5887601)

Your feedback on these changes is greatly appreciated.

[Diogo21Costa]

@josecm consolidated all error message updates into a single commit (878ad2b). As this commit fixes the content introduced in 5887601, may I squash both commits to keep the git history clean?

The same applies to commits 1a898b4 and 196a404 ( The first one introduces the spinlock initialization). Should they be squashed?

[josecm]

@Diogo21Costa Yeah, I'd say the history should be re-written and include the new fixes directly on the original commits.

[Diogo21Costa]

@Diogo21Costa Yeah, I'd say the history should be re-written and include the new fixes directly on the original commits.

@josecm Done, thank you!

[DavidMCerdeira]

This commit's description df3168c does not match the code changes

Otherwise seems good

[Diogo21Costa]

This commit's description df3168c does not match the code changes

Otherwise seems good

@DavidMCerdeira Nice catch, thank you. Solved.