Fix Run lens showing when lenses are disabled

The documentation for `lens.run.enable` states that it only applies
when `lens.enable` is set. However, the config setting whether to show
the Run lens did not check `lens.enable`, so the Run lens would show
even though lenses were disabled.

Author: hermannm

src/tools/rust-analyzer/crates/rust-analyzer/src/config.rs

@@ -1776,7 +1776,7 @@ impl Config {
 
     pub fn lens(&self) -> LensConfig {
         LensConfig {
-            run: *self.lens_run_enable(),
+            run: *self.lens_enable() && *self.lens_run_enable(),
             debug: *self.lens_enable() && *self.lens_debug_enable(),
             interpret: *self.lens_enable() && *self.lens_run_enable() && *self.interpret_tests(),
             implementations: *self.lens_enable() && *self.lens_implementations_enable(),