buildBazelPackage: set fetchConfigured default to true

nixos/doc/manual/from_md/release-notes/rl-2111.section.xml

···
           this version for the entire lifecycle of the 21.11 release.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          Those making use of <literal>buildBazelPackage</literal> will
+          need to regenerate the fetch hashes (preferred), or set
+          <literal>fetchConfigured = false;</literal>.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="other-notable-changes">

nixos/doc/manual/release-notes/rl-2111.section.md

···
 * PHP 7.3 is no longer supported due to upstream not supporting this
   version for the entire lifecycle of the 21.11 release.
 
+* Those making use of `buildBazelPackage` will need to regenerate the fetch
+  hashes (preferred), or set `fetchConfigured = false;`.
+
 ## Other Notable Changes

pkgs/build-support/build-bazel-package/default.nix

···
 # required for the build as configured, rather than fetching all the dependencies
 # which may not work in some situations (e.g. Java code which ends up relying on
 # Debian-specific /usr/share/java paths, but doesn't in the configured build).
-, fetchConfigured ? false
+, fetchConfigured ? true
 
 # Don’t add Bazel --copt and --linkopt from NIX_CFLAGS_COMPILE /
 # NIX_LDFLAGS. This is necessary when using a custom toolchain which