finalization: step-*.sh: optionally skip repo upload

Teach the step-*.sh scripts to parse command line options. Add support
for --dry-run, which will skip the part where the CLs are uploaded:
useful for local experiments.

Bug: 323940469
Test: croot && build/tools/finalization/step-1.sh --dry-run # verify no CLs uploaded
Ignore-AOSP-first: VIC finalization happens outside AOSP
Change-Id: Ia58da02ae7a69c24f8332c90d1c779884e3a1dab

tools/finalization/step-2.sh

@@ -11,12 +11,13 @@ function commit_step_2_changes() {
 Bug: $FINAL_BUG_ID
 Test: build";
 
-            repo upload --cbr --no-verify -o nokeycheck -t -y . ;
+            repo upload '"$repo_upload_dry_run_arg"' --cbr --no-verify -o nokeycheck -t -y . ;
         fi'
 }
 
 function finalize_step_2_main() {
     local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/command-line-options.sh
     source $top/build/make/tools/finalization/environment.sh
 
     # prebuilts etc
@@ -33,4 +34,4 @@ function finalize_step_2_main() {
     AIDL_FROZEN_REL=true $m_fina
 }
 
-finalize_step_2_main
+finalize_step_2_main $@