Release 2022.7

(Some of these commits are actually only for the Rust bindings;
 will try to enhance the release flow to more clearly filter
 those out)

On the feature front, there's new APIs for idempotent delete operations on
kernel arguments, and for handling `unshare()` to
manipulate (otherwise) read-only sysroot.

A few very small memory leak fixes.

Many people will be happy that we now retry HTTP requests after
receiving HTTP 500 errors.

There's a notable bugfix avoiding rebuilding SELinux policy
when creating a first deployment.

Thanks to all contributors!

```
Colin Walters (18):
      Remove readdir-rand
      deploy: Don't rebuild selinux policy on first deployment
      ci: Bump memory for ISO testing flow
      rust: Update to cap-std 1.0
      rust: Drop `openat` dependency
      ci: Fix case where cosa != buildroot
      rust: Update to gio 0.16
      repo: Avoid potential double unwind when writing panic value
      Allow missing docs on two `glib::wrapper` functions
      sysroot: Add an API to initialize with mountns
      rust: Regenerate with latest gir and C sources
      tests/inst: Update to latest ostree-ext
      tests/inst: Drop nix dependency
      tests/inst: Update cap-std-ext to 1.0
      tests/inst: Update sh-inline
      tests: Require OSTREE_TEST_SUDO to be set to use `sudo`
      ci: Add a flow that combines C build and Rust integration tests
      Release 2022.7

Jonathan Lebon (4):
      ci: Bump memory request, use fcosKolaTestIso
      ci: Drop unnecessary outer stage
      ci: Use new names for custom kola steps
      ci: bump cosaPod memory requirement to 5Gi

Luca BRUNO (20):
      configure: post-release version bump
      lib/repo-checkout: fix typo in error message
      lib/bootloader-zipl: check for errors when opening initrd
      lib/static-delta: document and check parameters format
      rust/tests: fix static delta generation testcase
      lib/sign-ed25519: convert invariant checks to assertions
      rust: regenerate bindings after latest release (2022.6)
      ostree: manually patch generated files
      rust: update manual helpers
      ci/rust: bump linting toolchain to latest stable (1.64)
      lib/repo-refs: properly return an error value
      rust: update pinned gir tool to 0.15
      rust/ostree-sys: regenerate for gtk-rs 0.15
      rust/ostree: regenerate for gtk-rs 0.15
      ci/rust: test from git using latest feature
      cargo: prepare ostree 0.16.0 and ostree-sys 0.11.0
      copr: only use libostree tags
      ci: adjust git tags filtering
      cargo: bump minimum Rust version to 1.63
      ostree: manually patch generated files

Manuel Stühn (1):
      Add test for generating static delta to file

Philip Withnall (4):
      ot-builtin-commit: Fix a typo in a command line help string
      ot-builtin-commit: Don’t mention a C function name in a help string
      lib/pull: Fix a small leak when a variable is reused
      ot-builtin-pull: Fix a minor leak with progress reporting

Rafael Garcia Ruiz (2):
      ostree_kernel_args_contains for OstreeKernelArgs
      Idempotent delete operation for  OstreeKernelArgs

Ricardo Noriega (2):
      Enabling retry for HTTP 500 internal server error
      Add tests for cases under random 500s

Simon McVittie (2):
      readdir-rand: Copy full size of struct dirent
      Replace calls to g_memdup() with g_memdup2()

dependabot[bot] (2):
      build(deps): bump libglnx from `26375b5` to `e701578`
      build(deps): bump libglnx from `e701578` to `4e44fd9`
```

Git-EVTag-v0-SHA512: 9cbc7a178f1cc0dbda25ea1af5f9d4991f41c28768826c44cf2d42333c0677b22daaef6532eb075931f6c5622947780daaa1ec4a5fc64e2adef230feaed372c7