use ldflags during build

this commit enables usage of ldflags during the build process. This is
useful for getting the version in the logs via tilt UI.

Signed-off-by: Anurag <anurag.kumar@syself.com>

Tiltfile

@@ -134,7 +134,6 @@ else:
 
 # Build CSO and add feature gates
 def deploy_cso():
-    # yaml = str(kustomizesub("./hack/observability")) # build an observable kind deployment by default
     if settings.get("local_mode"):
         yaml = str(kustomizesub("./config/localmode"))
     else:
@@ -146,11 +145,11 @@ def deploy_cso():
     )
 
     # Forge the build command
-    # ldflags = "-extldflags \"-static\" " + str(local("hack/version.sh")).rstrip("\n")
+    ldflags = "-extldflags \"-static\" " + str(local("hack/version.sh")).rstrip("\n")
     build_env = "CGO_ENABLED=0 GOOS=linux GOARCH=amd64"
-    build_cmd = "{build_env} go build -o .tiltbuild/manager cmd/main.go".format(
+    build_cmd = "{build_env} go build -ldflags '{ldflags}' -o .tiltbuild/manager cmd/main.go".format(
         build_env = build_env,
-        # ldflags = ldflags,
+        ldflags = ldflags,
     )
     # Set up a local_resource build of the provider's manager binary.
     local_resource(