Backport of "ci: Generate html and cobertura coverage with a single command" into 0.23

Backport of !1497 (merged) "ci: Generate html and cobertura coverage with a single command".

Commits:

• 80d1066a ci: Generate html and cobertura coverage with a single command

Commits from !1507 (merged):

• 2061a4e3 ci/windows-docker: Move rustup install into a ps1 script
• 30d247fd ci: Update to Rust 1.80
• a145ce6a Ignore a new 1.80 clippy warning
• ce9c1729 ci: Update to meson 1.5.1
• 99f598a4 ci: Update to dav1d 1.4.3
• c9412e66 ci: Update to cargo-c 0.9.26 and 0.10.3 when building for nightly
• 57f407fa ci: Also use cargo-c 0.10.3 for Rust 1.80
• 326e5861 ci: Don't use --locked for cargo-outdated / grcov with 1.80 / nightly
• 6674f8d2 ci: Update to Rust 1.80.1
• 6c5ceca8 ci: Fix version checks
• ae120b30 ci: Remove unnecessary --force from cargo install
• 75ed9b66 ci: Update ci-templates ref
• b829c41c ci: Add comments to the windows dockerfile about build-args

Commits from !1508 (merged):

• 4ee374e6 ci: Pin the windows jobs to gstreamer runners for now
• 9b5b1d46 ci: Avoid cloning the submodules when they are not needed
• a8234a67 ci: Use gstreamer runners for jobs that recursively clone submodules
• e8797c95 ci: Add a default retry policy for jobs

Commits from !1509 (merged):

• 78c490ef ci: Update the .cargo/config file

Commits from !1510 (merged):

• c7694a4a ci: Fix rust version check in the windows build
• ec66403c ci: Remove the manual trigger for the rust msrv windows job
• 44479cf4 ci: Rely on the monorepo's gtk subproject support
• 09bc0a28 examples: d3d11videosink: Fix compiler warning about unused closure parameter
• c463c078 examples: glupload: Fix compilation with Rust < 1.72 on Windows
• 63935bb6 ci: Update image version
• ebe7f5f6 ci: Force fallback for glib when building gstreamer
• 7959e372 ci: Disable GTK Vulkan backend

Commits from !1511 (merged):

• 4cf22e91 ci: Don't pip install tomli on Debian anymore
• 57aa8e09 ci: Use debian's gtk package instead of building our own
• c5dfc879 ci: Bump linux image tag, and make a separate tag for windows

Commits from !1496 (merged):

• 73d9793f Fix new 1.80 clippy warnings