[build] Rename requirements files to clean up dependency graph (#16740)

Authored by: bashonly

.github/workflows/build.yml

@@ -325,7 +325,7 @@ jobs:
           brew uninstall --ignore-dependencies python3
           python3 -m venv ~/yt-dlp-build-venv
           source ~/yt-dlp-build-venv/bin/activate
-          python3 -m pip install -U --require-hashes -r "bundle/requirements/requirements-pip.txt"
+          python3 -m pip install -U --require-hashes -r "bundle/requirements/pip.txt"
           rm -rf build
           # Only directly install wheels for "macosx_10_15_universal2" and "any" platforms
           mkdir -p build/wheels
@@ -335,7 +335,7 @@ jobs:
             --platform=any \
             -d build/wheels \
             --require-hashes \
-            -r "bundle/requirements/requirements-macos.txt"
+            -r "bundle/requirements/macos.txt"
           python3 -m pip install --force-reinstall --no-deps -U build/wheels/*.whl
           rm -rf build/wheels/*
           # We need to fuse our own universal2 wheels for curl_cffi and cffi
@@ -347,7 +347,7 @@ jobs:
               --platform "${platform}" \
               -d build/wheels \
                --require-hashes \
-              -r "bundle/requirements/requirements-macos-curl_cffi.txt"
+              -r "bundle/requirements/macos-curl_cffi.txt"
           done
           python3 -m delocate.cmd.delocate_merge build/wheels/curl_cffi-*.whl -w build/universal2
           python3 -m delocate.cmd.delocate_merge build/wheels/cffi-*.whl -w build/universal2
@@ -456,12 +456,12 @@ jobs:
           $PSNativeCommandUseErrorActionPreference = $true
           python -m venv /yt-dlp-build-venv
           /yt-dlp-build-venv/Scripts/Activate.ps1
-          python -m pip install -U --require-hashes -r "bundle/requirements/requirements-pip.txt"
-          python -m pip install -U --require-hashes -r "bundle/requirements/requirements-win-${Env:ARCH}-pyinstaller.txt"
+          python -m pip install -U --require-hashes -r "bundle/requirements/pip.txt"
+          python -m pip install -U --require-hashes -r "bundle/requirements/win-${Env:ARCH}-pyinstaller.txt"
           if (${Env:ARCH} -eq "x86") {
-            python -m pip install -U --require-hashes -r "bundle/requirements/requirements-default.txt"
+            python -m pip install -U --require-hashes -r "bundle/requirements/default.txt"
           } else {
-            python -m pip install -U --require-hashes -r "bundle/requirements/requirements-curl-cffi.txt"
+            python -m pip install -U --require-hashes -r "bundle/requirements/curl-cffi.txt"
           }
 
       - name: Prepare