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-0.sh

@@ -15,12 +15,13 @@ function commit_step_0_changes() {
                        -m "Ignore-AOSP-First: VINTF $FINAL_BOARD_API_LEVEL Finalization
 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_0_main() {
     local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/command-line-options.sh
     source $top/build/make/tools/finalization/environment.sh
 
     local m="$top/build/soong/soong_ui.bash --make-mode TARGET_RELEASE=next TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
@@ -34,4 +35,4 @@ function finalize_step_0_main() {
     AIDL_FROZEN_REL=true $m
 }
 
-finalize_step_0_main
+finalize_step_0_main $@