make sure the msrv for `const_raw_ptr_deref` is met when linting [`missing_const_for_fn`]

[J-ZhengLi]

fixes: #8864

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changelog: make sure the msrv for const_ptr_deref is met when linting [missing_const_for_fn]

[rustbot]

r? @dswij

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[J-ZhengLi]

Finally got some time to work on this. @rustbot ready

[y21]

Since dswij seems to be a little busy and has a bunch of other PRs assigned and I already started reviewing this, I'm gonna steal this one to move it forwards. Hope you dont mind :D r? @y21

[dswij]

Yeah, feel free :)

[y21]

Thanks! @bors r+

[bors]

:pushpin: Commit 1b7fc5f5aad72bc507e3efe9c7adb808a9835690 has been approved by y21

It is now in the queue for this repository.

[bors]

:hourglass: Testing commit 1b7fc5f5aad72bc507e3efe9c7adb808a9835690 with merge caad063933e5012b152d883a6c03f1d0ad5ec6a8...

[bors]

:sunny: Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test Approved by: y21 Pushing caad063933e5012b152d883a6c03f1d0ad5ec6a8 to master...

[bors]

:sunny: Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test Approved by: y21 Pushing caad063933e5012b152d883a6c03f1d0ad5ec6a8 to master...

[bors]

:eyes: Test was successful, but fast-forwarding failed: 422 Changes must be made through a pull request.