Reduce time in Cloudbeat CI

[ofiriro3]

Summary of your changes

After multiple attemps to run the unit-test.yml in the CI, it seems that it the racing validation step causes a timeout.
Instead of increasing the step timeout, and by that increasing the general time that the CI runs, we would like to merge to steps in the CI:

• The race validation check
• Coverage and unit test step

By merging these two into one step we hope to get the same result in less CI time.

[mergify]

This pull request does not have a backport label. Could you fix it @ofiriro3? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v./d./d./d is the label to automatically backport to the 8./d branch. /d is the digit
  NOTE: backport-skip has been added to this pull request.

[oren-zohar]

it's not because of the race flag, and we need this flag, closing

[olegsu]

@oren-zohar the flag was just moved to the unit test, so we don't run the unit test twice.

[oren-zohar]

will be fixed here (+ using the go dependencies caching to further reduce the running time)