Run format check in our CI and fix repo format

[celinval]

Changed the check-rustc.sh script to run the format check. Also added a --bless mode to apply the changes locally.
This change also includes the result of running the script with the --bless mode on.

Related to #38

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.

[zhassan-aws]

Awesome! What does the error look like when the formatting check fails?

[celinval]

Awesome! What does the error look like when the formatting check fails?

It will contain the diff of the files in the temporary folder, like any rustfmt failure.

[celinval]

I'll solve the merge conflicts after the second review

[zhassan-aws]

Awesome! What does the error look like when the formatting check fails?

It will contain the diff of the files in the temporary folder, like any rustfmt failure.

When it fails, would it be possible for the script to print the command the user should run to format the code?

[tautschnig]

I'll solve the merge conflicts after the second review

I’ll re-approve once conflicts are resolved.

[celinval]

Awesome! What does the error look like when the formatting check fails?

It will contain the diff of the files in the temporary folder, like any rustfmt failure.

When it fails, would it be possible for the script to print the command the user should run to format the code?

Sure... I can do that