Release 2023.1

For features, the metadata API is much improved and there's
support for Android "aboot".

On the bugfix side, there's a notable fix for concurrent
prunes and commits.  Also, we now use less memory during pulls.

```
Alex Kiernan (2):
      lib/repo-checkout: Add ALLPERMS for musl
      tests: Handle musl's ERANGE mapping

Colin Walters (5):
      fetcher: Avoid too large queues for metadata processing
      configure: post-release version bump
      Release 2023.1

Dan Nicholson (16):
      tests/inst: Update hyper-staticfile to 0.9.4
      Strip trailing whitespace on all C files
      repo: Add API to regenerate and sign repo metadata
      bin/summary: Use ostree_repo_regenerate_metadata
      commit: Allow skipping automatic summary generation
      repo: Create metadata commit in ostree_repo_regenerate_metadata
      lib: Provide internal summary signing with separate directory
      repo: Prevent publishing summary without matching signature
      bin: Cleanup documentation of --cache-dir option
      bin/refs: Sort listing
      bin/refs: Add option to print revisions
      bin/remote-refs: Add option to print revisions
      bin/show: Add options to list metadata keys
      ostree/dump: Add support for summary metadata keys
      bin/summary: Add options to show metadata
      bin/remote-summary: Add options to show metadata

Eric Curtin (1):
      bootloader: Add an aboot (Android) bootloader backend

Jonathan Lebon (1):
      ostree/prune: Calculate reachability under exclusive lock

Luca BRUNO (4):
      lib: assert more invariants
      configure: use pkg-config with newer gpgme and gpg-error
      lib/repo: fix an 'unused-function' warning
      lib/sysroot-upgrader: add some 'nullable' annotations

Tareque Md Hanif (1):
      docs: Fix link to ostree-rs

```
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