fix: Skip downloading providers that are configured as developer overrides, matching handling of reattached providers.

This change is coupled to another change in a later commit where we will stop the init command removing developer override providers from the provider requirements passed to the installer; we will achieve the same outcome by making the installer ignore dev_override providers regardless of whether they're listed in the config's provider requirements or not.

internal/command/meta_providers_test.go

@@ -144,7 +144,7 @@ func TestEnsureProviderVersions_devOverrideAndReattachedProviders(t *testing.T)
 				providerA.ForDisplay(),
 				providerB.ForDisplay(),
 				providerC.ForDisplay(),
-				providerD.ForDisplay(), // D is installed despite being dev overridden
+				// D is not installed due to being dev override
 			},
 		},
 

internal/providercache/installer.go

@@ -252,6 +252,10 @@ func (i *Installer) EnsureProviderVersions(ctx context.Context, locks *depsfile.
 			// unmanaged providers do not require installation
 			continue
 		}
+		if _, ok := i.devOverrideTypes[provider]; ok {
+			// development override providers do not require installation
+			continue
+		}
 		acceptableVersions := versions.MeetingConstraints(versionConstraints)
 		if !mode.forceQueryAllProviders() {
 			// If we're not forcing potential changes of version then an