[github actions] Fix token issue on actions/checkout package (#141652)

revision 01/17: instead of removing actions/checkout, keep actions/checkout but remove the `token` field and add `persist-credentials` field. tested with a [mirror script](https://github.com/XilaiZhang/miscellaneous-side-project/blob/master/.github/workflows/easy-cp.yml) and creates [expected pull request](https://github.com/flutter/flutter/pull/141730)

Issue: when running github actions, the [tokens not found error](https://github.com/actions/checkout/issues/298) still happens( `Input required and not supplied: token`). We are not using fork PR or dependabot, and it's flaky when the well defined token isn't find in the inputs. We hit this error when invoking [market place actions/checkout](https://github.com/actions/checkout): [example failed run 1](https://github.com/flutter/flutter/actions/runs/7546108771/job/20543199801), [example failed run 2](https://github.com/flutter/flutter/actions/runs/7546141972/job/20543265842)

In this PR, Remove the dependency on marketplace actions  to make our workflow more reliable and less flaky.

other changes to remove actions/checkout dependency:
1. embedded token url for git push
Tried a number of ways and this is the only / best workaround I found to resolve [the notorious problem of pushing without ssh key](https://stackoverflow.com/questions/22147574/github-fatal-could-not-read-username-for-https-github-com-no-such-file-o). 
2. added back `--head`
`--head` is now needed to avoid [abort](https://github.com/XilaiZhang/miscellaneous-side-project/actions/runs/7548409479/job/20550397014)

Test: a [replicate of the actions file](https://github.com/XilaiZhang/miscellaneous-side-project/blob/master/.github/workflows/easy-cp.yml) is [tested](https://github.com/XilaiZhang/miscellaneous-side-project/actions/runs/7548448024/job/20550521341) on my personal repo, and it creates the [expected PR](https://github.com/flutter/flutter/pull/141647)

.github/workflows/easy-cp.yml

@@ -33,9 +33,9 @@ jobs:
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
         with:
           repository: flutteractionsbot/flutter
-          token: ${{ secrets.FLUTTERACTIONSBOT_CP_TOKEN }}
           path: flutter
           ref: master
+          persist-credentials: false
           # Checkout all history commits on master branch, so that the cp commit is a known object
           fetch-depth: 0
       # use same name when checking out branch, since the marketplace action does a hard reset.
@@ -58,8 +58,8 @@ jobs:
         if: ${{ steps.attempt-cp.conclusion == 'success' }}
         working-directory: ./flutter
         run: |
-          git push -u origin cp-${CHANNEL}-${COMMIT_SHA}
-          gh pr create --title "[CP-${CHANNEL}]${PR_TITLE}" --body-file ../PULL_REQUEST_CP_TEMPLATE.md --base ${RELEASE_BRANCH} --label "cp: review" --repo flutter/flutter
+          git push https://${{ env.GITHUB_TOKEN }}@github.com/flutteractionsbot/flutter cp-${CHANNEL}-${COMMIT_SHA}
+          gh pr create --title "[CP-${CHANNEL}]${PR_TITLE}" --body-file ../PULL_REQUEST_CP_TEMPLATE.md --base ${RELEASE_BRANCH} --label "cp: review" --repo flutter/flutter --head flutteractionsbot:cp-${CHANNEL}-${COMMIT_SHA}
         env:
           GITHUB_TOKEN: ${{ secrets.FLUTTERACTIONSBOT_CP_TOKEN }}
           PR_TITLE: ${{ github.event.pull_request.title }}