Simplify layered workflows around version string generation (#30865)

* Add reusable build workflow

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch to composite action

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Make checkout happier

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Hoist upload artifact

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* copy pasta

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Description

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Simplify

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix passing env

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

.github/workflows/static_analysis.yaml

@@ -12,8 +12,7 @@ concurrency:
     cancel-in-progress: true
 
 env:
-    # These must be set for fetchdep.sh to get the right branch
-    REPOSITORY: ${{ github.repository }}
+    # This must be set for fetchdep.sh to get the right branch
     PR_NUMBER: ${{ github.event.pull_request.number }}
 
 permissions: {} # No permissions required