Move regular Alpine to stable, add unstable Alpine NoGIL (#626)

Also enable regular Alpine for future branches.

Author: zware

master/custom/builders.py

@@ -180,6 +180,9 @@
 
 # -- Stable No Tier builders --------------------------------------------
 STABLE_BUILDERS_NO_TIER = [
+    # Linux x86-64 GCC musl
+    ("AMD64 Alpine Linux", "ware-alpine", UnixBuild),
+
     # Linux x86-64 GCC/Clang
     # Special builds: FIPS, ASAN, UBSAN, TraceRefs, Perf, etc.
     ("AMD64 RHEL8 FIPS Only Blake2 Builtin Hash", "cstratak-RHEL8-fips-x86_64", RHEL8NoBuiltinHashesUnixBuildExceptBlake2),
@@ -314,9 +317,8 @@
 
 # -- Unstable No Tier builders ------------------------------------------
 UNSTABLE_BUILDERS_NO_TIER = [
-    # Linux x86-64 GCC musl
-    ("AMD64 Alpine Linux", "ware-alpine", UnixBuild),
-
+    # Linux x86-64 GCC musl Freethreading
+    ("AMD64 Alpine Linux NoGIL", "ware-alpine", UnixNoGilBuild),
     # Linux GCC Fedora Rawhide Freethreading builders
     ("AMD64 Fedora Rawhide NoGIL", "cstratak-fedora-rawhide-x86_64", FedoraRawhideFreedthreadingBuild),
     ("aarch64 Fedora Rawhide NoGIL", "cstratak-fedora-rawhide-aarch64", FedoraRawhideFreedthreadingBuild),
@@ -394,7 +396,6 @@ def get_builder_tier(builder: str) -> str:
 # Match builder name (excluding the branch name) of builders that should only
 # run on the main and PR branches.
 ONLY_MAIN_BRANCH = (
-    "Alpine Linux",
     "ARM64 Windows",
     "Windows PGO",
     "AMD64 Arch Linux Perf",

master/custom/workers.py

@@ -218,8 +218,8 @@ def get_workers(settings):
         ),
         cpw(
             name="ware-alpine",
-            tags=['linux', 'unix', 'alpine', 'docker', 'amd64', 'x86-64'],
-            branches=[MAIN_BRANCH_NAME],
+            tags=['linux', 'unix', 'alpine', 'docker', 'amd64', 'x86-64', 'musl'],
+            not_branches=['3.9', '3.10', '3.11', '3.12', '3.13', '3.14'],
         ),
         cpw(
             name="ware-freebsd",