chore: release v0.2.167

They aren't stable across OS versions, and they don't have any
legitimate use in applications.

We have a handful of jobs that could benefit from reusing the target
directory. Make use of Swatinem/rust-cache to do so.

Something still isn't quite right since the largest job only seems to
be restoring a portion of the cache, but this still shows an improvement
for most jobs.

(backport <#4178>)
(cherry picked from commit af7e126)

This lint was recently added so this change is needed to fix CI. The
suggested alternative is to use `ptr::fn_addr_eq` which isn't available
until 1.85, so allow the lint here.

(backport <#4177>)
(cherry picked from commit 99f4dd9)

(backport <#4179>)
(cherry picked from commit cde5e54)

(backport <#4179>)
(cherry picked from commit 5b471ae)

Add these functions, similar to the Linux ones. Also add tests.

For illumos, the source code is at [1] and documentation is at [2]. Blame
suggests that Solaris also supports the same calls.

[1]: https://github.com/illumos/illumos-gate/blame/27ecbff00d8c86a2647d6fe325cacb220d712115/usr/src/uts/common/sys/iso/signal_iso.h#L100-L101
[2]: https://illumos.org/man/3HEAD/signal.h

(backport <#4171>)
(cherry picked from commit a8aaadf)

ref: https://github.com/torvalds/linux/blob/feffde684ac29a3b7aec82d2df850fbdbdee55e4/include/uapi/linux/mman.h#L20

(backport <#4173>)
(cherry picked from commit 40a4d33)

`PF_BLOCK_TS` and `PF_SUSPEND_TASK`.

They are also added to the tests. Interestingly, `PF_SUSPEND_TASK` is
already there somewhere in the build script 🤔

Signed-off-by: Paul Mabileau <paul.mabileau@harfanglab.fr>

(backport <#4174>)
(cherry picked from commit 6934e52)

Taken from <https://github.com/torvalds/linux/blob/2ba9f676d0a2e408aef14d679984c26373bf37b7/include/linux/sched.h#L1661\>.

Signed-off-by: Paul Mabileau <paul.mabileau@harfanglab.fr>

(backport <#4174>)
(cherry picked from commit 9a38ea3)

They didn't seem to already exist, so add them. The new ones are included.

Signed-off-by: Paul Mabileau <paul.mabileau@harfanglab.fr>

(backport <#4174>)
(cherry picked from commit 5997f35)

(backport <#4185>)
(cherry picked from commit 70c1e82)

(backport <#4176>)
(cherry picked from commit 6faa521)

[ resolve conflicts and update based on some main vs. 0.2 differences -
  Trevor ]

[memccpy](https://pubs.opengroup.org/onlinepubs/9699919799/functions/memccpy.html)

[mempcpy](https://man7.org/linux/man-pages/man3/mempcpy.3.html)

(backport <#4186>)
(cherry picked from commit ba5930d)

[0.2] Backports

This gives us something easier to inspect when the automatically
generated tests fail.

(backport <#4180>)
(cherry picked from commit 68f3056)

[0.2] Backports

Co-authored-by: Trevor Gross <tmgross@umich.edu>