[stable] Prepare Rust 1.68.2

[pietroalbini]

This PR prepares the 1.68.2 point release, including the following Cargo PRs:

• Added new GitHub RSA Host Key cargo#11883
• Add the old github keys as revoked cargo#11889

The following PR was also included as a pre-requisite for backporting:

• Add partial support for SSH known hosts markers cargo#11635

cc @rust-lang/release
r? @ghost

[rustbot]

Some changes occurred in src/tools/cargo

cc @ehuss

[pietroalbini]

@bors r+ p=1000 rollup=never

Hopefully I'll wake up to a built point release 🤞

[bors]

📌 Commit c9c09cf735496e449e99eb08ad0c1ebeb7e0e97b has been approved by pietroalbini

It is now in the queue for this repository.

[bors]

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

[bors]

⌛ Testing commit c9c09cf735496e449e99eb08ad0c1ebeb7e0e97b with merge dec22a1742da561824db9f067e4ce5070ade4501...

[bors]

💔 Test failed - checks-actions

[rustbot]

These commits modify the Cargo.lock file. Random changes to Cargo.lock can be introduced when switching branches and rebasing PRs.
This was probably unintentional and should be reverted before this PR is merged.

If this was intentional then you can ignore this comment.

[pietroalbini]

...

@bors r+ p=1000 rollup=never

[bors]

📌 Commit fa0aae4 has been approved by pietroalbini

It is now in the queue for this repository.

[bors]

⌛ Testing commit fa0aae4 with merge 091d3c93aaee1657aa661d5be09cb3d4471f1fcf...

[bors]

💥 Test timed out

[rust-log-analyzer]

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[weihanglo]

Can't see any error. Let's @bors retry

[bors]

⌛ Testing commit fa0aae4 with merge 9eb3afe...

[bors]

☀️ Test successful - checks-actions
Approved by: pietroalbini
Pushing 9eb3afe to stable...