style(core): reformat all of packages/core with new clang format version

[kara]

This commit updates the formatting of all packages/core/*
files at once to comply with the new version of clang.
Doing it all at once this way will cause some short-term
rebasing of existing core PRs, but will prevent head-
aches when reviewing PRs down the line (because we
will not have to filter out the noise of unrelated
formatting changes as these files are touched in the
future).

[IgorMinar]

Can we please do this ones across the whole repo and not just within packages/core as the entire repo is affected in the same way?

Additionally we should consider writing a script that would go over all the existing PRs that currently don't have a merge conflict and:

• check them out
• rebase them on the latest master
• reformat them
• add a "style:" commit with the reformatting diff
  -and force push to the PR branch

That way we know that all the existing PRs that are currently in a good enough shape, will remain in a good enough shape.

This will still leave us with a lot of PRs that currently have a merge conflict and can't be cleanly rebased, in which case we need to come up with a different reformatting strategy for these....

[kara]

@IgorMinar In the Monday sync, we agreed to do the repo in smaller pieces (see #36520 for another example). Let's chat offline.

[IgorMinar]

We discussed this with @kara and @josephperrott in person and agreed that the best course of action is to merge this PR and schedule follow up work to reformat the rest of the monorepo.

@josephperrott is looking into possibility to update the PRs automatically in the future, but we will not block this PR on that.

@josephperrott is also going to look into using prettier instead.

[IgorMinar]

Reviewed-for: global-approvers

[IgorMinar]

one more update: we decided to hold off on this PR until tomorrow, while @josephperrott and I are investigating feasibility of switching over to prettier and reformatting the whole repo with it.

[kara]

Update: we're going to switch to Prettier, so this PR is out of date

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