CI: migrate to upload-artifact@v4, download-artifact@v4 and labeler@v5 (#10431)

* Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Bump actions/download-artifact from 3 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* github: group github actions updates going forward

* ci: update to labeler@v5

* ci: properly differentiate between windows build artifacts on PRs

* ci: workaround flatpak-builder temporarily as well as test fix

* ci: simplify things, just explicitly specify the artifact names in the workflows

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tyler Wilding <xtvaser@gmail.com>

.github/workflows/scripts/common/name-artifacts.sh

@@ -1,39 +1,26 @@
 #!/bin/bash
 
 # Artifact Naming Scheme:
-# PCSX2-<OS>-Qt-[ARCH]-[SIMD]-[pr\[PR_NUM\]]-[title|sha\[SHA|PR_TITLE\]
+# PCSX2-<OS>-Qt-[BUILD_SYSTEM]-[ARCH]-[SIMD]-[pr\[PR_NUM\]]-[title|sha\[SHA|PR_TITLE\]
 # -- limited to 200 chars
 # Outputs:
 # - artifact-name
 
+# Example - PCSX2-linux-Qt-x64-flatpak-sse4-sha[e880a2749]
+
 # Inputs as env-vars
-# OS
-# BUILD_SYSTEM
-# ARCH
-# SIMD
+# PREFIX
 # EVENT_NAME
 # PR_TITLE
 # PR_NUM
 # PR_SHA
 
-NAME=""
-
-if [ "${OS}" == "macos" ]; then
-  # MacOS has combined binaries for x64 and ARM64.
-  NAME="PCSX2-${OS}-Qt"
-elif [[ ("${OS}" == "windows" && "$BUILD_SYSTEM" != "cmake") ]]; then
-  NAME="PCSX2-${OS}-Qt-${ARCH}-${SIMD}"
-else
-  NAME="PCSX2-${OS}-Qt-${ARCH}"
+if [[ -z "${PREFIX}" ]]; then
+  echo "PREFIX is not set, can't name artifact without it!"
+  exit 1
 fi
 
-# Add cmake if used to differentate it from msbuild builds
-# Else the two artifacts will have the same name and the files will be merged
-if [[ ! -z "${BUILD_SYSTEM}" ]]; then
-  if [[ "${BUILD_SYSTEM}" == "cmake" ]] || [[ "${BUILD_SYSTEM}" == "flatpak" ]]; then
-    NAME="${NAME}-${BUILD_SYSTEM}"
-  fi
-fi
+NAME="${PREFIX}"
 
 # Add PR / Commit Metadata
 if [ "$EVENT_NAME" == "pull_request" ]; then