promote eck 2.13

[kvalliyurnatt]

This adds ECK 2.13 as the current branch. ECK 2.13.0 is planned for 21st May 2024, so this PR should be merged on 21st and after #3002 .

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[bmorelli25]

Okay wait I'm confused. If both of these PRs need to be merged on the same day then we should just combine them. I don't see a benefit to merging them separately.

[kvalliyurnatt]

Okay wait I'm confused. If both of these PRs need to be merged on the same day then we should just combine them. I don't see a benefit to merging them separately.

my bad, #3002 will be merged one day before release, on May 20th and this on May 21st