[cleanup] Misc (#16630)

* Fix PyPy dependency issue with cffi
* Export requirements files from dependency groups
* Simplify bundle targets & rework build flow
* Code cleanup & type annotation fixes
* Update FFmpeg-Builds status in README

Authored by: bashonly

bundle/docker/compose.yml

@@ -9,7 +9,7 @@ services:
       args:
         BUILDIMAGE: ghcr.io/yt-dlp/manylinux2014_x86_64-shared:latest
     environment:
-      REQUIREMENTS: linux-x86_64
+      REQUIREMENTS: linux
       EXE_NAME: ${EXE_NAME:?}
       CHANNEL: ${CHANNEL:?}
       ORIGIN: ${ORIGIN:?}
@@ -45,7 +45,7 @@ services:
       args:
         BUILDIMAGE: ghcr.io/yt-dlp/manylinux2014_aarch64-shared:latest
     environment:
-      REQUIREMENTS: linux-aarch64
+      REQUIREMENTS: linux
       EXE_NAME: ${EXE_NAME:?}
       CHANNEL: ${CHANNEL:?}
       ORIGIN: ${ORIGIN:?}
@@ -81,7 +81,7 @@ services:
       args:
         BUILDIMAGE: ghcr.io/yt-dlp/manylinux_2_31_armv7l-shared:latest
     environment:
-      REQUIREMENTS: linux-armv7l
+      REQUIREMENTS: linux
       EXE_NAME: ${EXE_NAME:?}
       CHANNEL: ${CHANNEL:?}
       ORIGIN: ${ORIGIN:?}
@@ -117,7 +117,7 @@ services:
       args:
         BUILDIMAGE: ghcr.io/yt-dlp/musllinux_1_2_x86_64-shared:latest
     environment:
-      REQUIREMENTS: musllinux-x86_64
+      REQUIREMENTS: linux
       EXE_NAME: ${EXE_NAME:?}
       CHANNEL: ${CHANNEL:?}
       ORIGIN: ${ORIGIN:?}
@@ -153,7 +153,7 @@ services:
       args:
         BUILDIMAGE: ghcr.io/yt-dlp/musllinux_1_2_aarch64-shared:latest
     environment:
-      REQUIREMENTS: musllinux-aarch64
+      REQUIREMENTS: linux
       EXE_NAME: ${EXE_NAME:?}
       CHANNEL: ${CHANNEL:?}
       ORIGIN: ${ORIGIN:?}

bundle/docker/linux/build.sh

@@ -14,6 +14,7 @@ export PYTHONPATH
 # shellcheck disable=SC1091
 source .venv/bin/activate
 
+python -m pip install -U --require-hashes -r "bundle/requirements/requirements-pyinstaller.txt"
 python -m pip install -U --require-hashes -r "bundle/requirements/requirements-${REQUIREMENTS}.txt"
 python -m devscripts.make_lazy_extractors
 python devscripts/update-version.py -c "${CHANNEL}" -r "${ORIGIN}" "${VERSION}"